The line that goes through the point (2,-2) and is perpendicular to the line shown by y=2/5x +2 will have the slope intercept equation 5x+3y=6.
What is equation of line?The definition of an equation in algebra is a mathematical statement that demonstrates the equality of two mathematical expressions. For instance, the equation 3x + 5 = 14 consists of the two equations 3x + 5 and 14, which are separated by the 'equal' sign. The point-slope form, standard form, and slope-intercept form are the three main types of linear equations.
Here,
Slope of the line given=2/5
Slope of the line perpendicular=-5/2
coordinates=(2,-2)
y=mx+b
-2=-5/2*2+b
b=3
y=-5/2x+3
3y=-5x+6
5x+3y=6
The equation in slope intercept form of the line that passes through the point (2,-2) and is perpendicular to the line represented by y=2/5x +2 will be 5x+3y=6.
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Find the midpoint of AC is at -2 and C is at 3 on a number line
The midpoint of AC is 0.5 where A is at -2 and C is at 3 on the number line.
What is number line?A number line is a line on which numbers are pointed at some intervals, it is used to show numerical operations.
Given that,
A and C are two points on number line.
A is at -2 and C is at 3
The midpoint of AC can be given by finding average of both the points,
Midpoint of AC = (-2 + 3) / 2
= 1 /2
= 0.5
The required midpoint of AC where A is at -2 and C is at 3 is 0.5.
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Which is the domain of the function f(x) = negative five-sixths (three-fifths) superscript x?all real numbersall real numbers less than 0all real numbers greater than 0all real numbers less than or equal to 0.
The function's domain is (a) all real numbers.
What is the domain in math?The range of values that we are permitted to enter into our function is known as the domain of a function. The x values for a function like f make up this set. A function's range is the set of values it can take as input. After we enter an x value, the function outputs this set of values.
How do you identify the domain?The formula for the function is: f(x) = Negative 5/6. X in superscript?
The function mentioned above is exponential
There are no input value restrictions for exponential functions
Consequently, the function's domain is (a) all real numbers.
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in an examination, the following was found 40% passed in mathematics 45% passed in science 55% passed in health. how many candidates passed in all three subjects?
5% of the students either passed all 3, or none of the tests.
What is amount ?
Mass nouns are referred to by the word amount. Count nouns are referred to as numbers.
To illustrate the process of thinking, tets assume there are no people who passed all subjects.
40% (Maths) - 10%(+sceince) - 15% (+english) = 15% only maths
45% - 10% - 20% = 15% only science
55% - 20% - 15% = 20% only english.
That gives
15+15+20 = 50% of the students passing only one course
10+20+15 = 45% of students passing only 2 courses
… that’s 95% together …
… but we need to get to 100%; obviously.
If we assume there are X% students that passed in all 3 courses, then from the first line, we substracted this person twice: (once for +science, and once for +english). Considering we only need to substract ’m once, that’s the same as substracting twice and adding once. we get:
40% (Maths) - 10%(+sceince) - 15% (+english) + X% = 15+X % only maths
and likewise
45% - 10% - 20% + X= 15 +X % only science
55% - 20% - 15% +x X= 20 +X % only english.
Now, for the students who passed exactly 2 classes, that’s
10 - X % only maths and science
20 - X %
15 - X%
And of course, the amount of students who passed all three exams: X.
This gives us
(15+X) + (15+X) + (20+X) + (10-X) + (20 - X) + (15 - X) + X = 100
95 + X = 100
X = 5
Or, 5% of students passed all 3 tests.
edit: this answer assumes all students pass at least one test. The actual summation should be: As pointed out with the first line, if that answer is
0%, the amount of students mentioned is 95%.
The actual answer is
5% of the students either passed all 3, or none of the tests.
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A line has a slope of 1 and passes through the point (–12, –17) What is its equation in slope intercept form?
Equation of the line in slope intercept form is y = x - 5, when slope is 1 and a point on the line is (-12, -17).
What is Slope?Slope of a line is the degree of inclination of that line.
In other words, slope of a line can be calculated by taking the change in y coordinates to the change in x coordinates when x coordinate and y coordinate of two points are given.
Equation of a line in slope-intercept form is,
y = mx + c
where, m is the slope and c is the y-intercept.
y- intercept is the y-coordinate of a point where the line touches with the Y-axis. x coordinate will be zero at this point.
We have m = 1 and a point (x, y) = (-12, -17)
Substituting these values in the equation,
-17 = (1 × -12) + c
-17 + 12 = c
c = -5
Substituting m = 1 and c = -5, equation in slope intercept form can be written as,
y = x - 5
Hence, the equation of the line in slope intercept form when slope = 1 and passing through the point (-12, -17) is y = x - 5.
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Greg evaluated his spending and found that he was spending about $50 more per month on utilities than he has budgeted. He can transfer money from other categories to increase his utilities budget to $125 per month. If his total monthly income is $2,400, to the nearest percent, what percent of his monthly income will be budgeted for utilities?.
The percent of his monthly income that will be budgeted for the utilities will be approximately 5.21%.
According to the question,
We have the following information:
Greg evaluated his spending and found that he was spending about $50 more per month on utilities than he has budgeted. He can transfer money from other categories to increase his utilities budget to $125 per month. If his total monthly income is $2,400.
Now, let's take the percent to be x.
We have the following expression:
2400*x/100 = 125
24x = 125
x = 125/24
x = 5.21%
Hence, the percent of his monthly income that will be budgeted for the utilities will be approximately 5.21%.
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Can somebody help me with 2 and 3 please
(2) The statements and reasons in the two-column method are presented as follows;
Statement [tex]{}[/tex] Reasons
1. [tex]\overline{BD}[/tex] bisects ∠ABC [tex]{}[/tex] 1. Given
2. ∠BAD ≅ ∠BCD [tex]{}[/tex] 2. Given
3. ∠ABD ≅ ∠CBD [tex]{}[/tex] 3. Definition of angle bisector
4. [tex]\overline{BD}[/tex] ≅ [tex]\overline{DB}[/tex] [tex]{}[/tex] 4. Reflexive property
5. ΔABD ≅ ΔCBD [tex]{}[/tex] 5. AAS congruency postulate
(3) The two-column method used to prove the congruency of triangles ΔQRS and ΔSTU, is presented as follows;
Statement [tex]{}[/tex] Reason
1. S is the midpoint of [tex]\overline{QU}[/tex] [tex]{}[/tex] 1. Given
2. [tex]\overline{QR}[/tex] ≅ [tex]\overline{ST}[/tex] [tex]{}[/tex] 2. Given
3. [tex]\overline{RS}[/tex] ≅ [tex]\overline{TU}[/tex] [tex]{}[/tex] 3. Given
4. [tex]\overline{QS}[/tex] ≅ [tex]\overline{SU}[/tex] [tex]{}[/tex] 4. Definition of midpoint of [tex]\overline{QU}[/tex]
5. ΔQRS ≅ ΔSTV [tex]{}[/tex] 5. SSS congruency postulate
What is the two-column method used to prove geometric statements?The two column method consists of statements and the associated reasons arranged sequentially side by side in a two-column tabula format.
The reasons used to prove the above statements are as follows;
Angle bisector
An angle bisector is a segment that divides an angle into two angles of the same measure.
Reflexive property
The reflexive property of equality states that the value of an object or the measure of a dimension is equal to itself
AAS congruency postulate
AAS which is the acronym for Angle-Angle-Side congruency, states that if two angles and a non included side of one triangle are congruent to two angles and the non included side of another triangle, then the two triangles are congruent
Midpoint of a line
The midpoint of a line is a point that divides the line into two segments of the same measure.
SSS congruency postulate
The Side-Side-Side congruency postulate states that two triangles are congruent if three sides are congruent to three sides of the other triangle
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what is the solution of -4(8-3x)>or=6x-8?
Answer: x > or = to 4 (Inequality Form), [4, infinity) (Interval Notation)
Step-by-step explanation:
Isolate the equation.
Divide each side by the factors that do not contain x.
Solve for x.
Determine if each function is linear or nonlinear. Drag each function into a box to correctly classify it.
y= x/2 -3 , y+3x = 12 and y = x are determined as linear equations , while y=6/x -2 and y= 3x^3 +5 are non-linear equations.
What do you mean by linear equations?A linear equation is a mathematical equation that forms a constant straight line on a graph.
What exactly is a nonlinear equation?Non-linear equations are functional equations that form different types of curves or other non-linear shapes on a graph.
According to the slope-intercept formula of the straight line : y=mx+b
1. y=6/x - 2 ,is not satisfying the above formula of straight line , having x in the denominator, hence it is a non-linear equation.
2. y=x/2-3 , here slope(m)=1/2 and intercept(b)=-3 which are real numbers and satisfy the straight line formula , hence it is a linear equation.
3. y=-3x+12, here slope(m)=-3 and intercept(b)=12 as real numbers and satisfy the straight line graph formula , hence it is a linear equation.
4. y = 3x^3+5, here slope(m)=3x^2 which is not a real number, hence not satisfying the given formula it is a non-linear equation.
5. y = x , here slope(m)=1 and intercept(b) =0 which are real numbers and satisfy the straight line graph formula ,hence it is a linear equation.
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Shane and abha earned a team badge that required their team to collect no less than 2000 20002000 cans for recycling. Abha collected 178 178178 more cans than shane did. Write an inequality to determine the number of cans, s ss, that shane could have collected.
Inequality is 2x+178 >=2000. and Solution set is x>=911 i.e., the no: of cans that Shane should have collected
What is inequality explain?The idea of inequality, which is the state of not being equal, especially in terms of status, rights, and opportunities1, is at the core of social justice theories. However, because it frequently has different meanings to different people, it is prone to misunderstanding in public discourse. However, some distinctions are shared.
What are the 3 types of inequality?Lifetime Inequality (the distribution of incomes across households or individuals over a person's lifetime), Inequality of Wealth (the distribution of wealth across households or individuals at a particular point in time), and Inequality of Opportunity (the impact on income of factors that people cannot control) are all related concepts.
Let the number of cans collected by Shane = x and the number of cans collected by Abha = y.
It is given that, Abha collected 178 cans more than Shane.
So, we have, .
Since, they both have to collect cans no less than 2000 i.e. greater than or equal to 2000.
So, the equation representing the situation is,
Shane + Abha ≥ 2000
i.e. y + x ≥ 2000
Thus, by substitution we have,
Inequality for the number of cans Shane collected is .2x+178 >=2000.
Solution set of the inequality is x>=911.
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pls answer the question in the image :)
The system of equations that to be used to calculate the number of chicken wings (x) and sliders (y) in the combination meal:
55x + 275y = 1100 and y = 8x.
What is system of equations?A system of equations is a collection of one or more equations with multiple variables.
Let x represent each onion ring.
Allow each slider to be represented by y.
That is what we are told;
The calorie count for each onion ring is 55.
The number of calories in each slider is 275.
A combination meal of both contained 1100calories.
Thus;
The equation formed wiil be,
55x + 275y = 1100
It also shows that there are 8 more onion rings than as many sliders.
Thus;
The equation formed is,
y = 8x
Therefore the system of equations in the combination meal are as follows: 55x + 275y = 1100 and y = 8x.
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Suppose you are trying to find your longitude and start looking for when the shadows are shortest at your house. You discover that this happens at 1:31:45 PM EDT (Eastern Daylight Savings Time).
What is this time in GMT?
Remember that EDT = GMT – 4.
Practice
A
1:31:45 PM
B
5:31:45 PM
C
9:31:45 AM
D
4:31:45 PM
The time calculation which involve calculating the time in GMT when it is 1:31:45 PM EDT (Eastern Daylight Savings Time) is
B 5:31:45 PMHow to convert from Eastern Daylight Savings Time to GMTThe conversion given in the problem is
Eastern Daylight Savings Time = Greenwich mean time GMT - 4
Eastern Daylight Savings Time + 4 = Greenwich mean time GMT
Solving for the time equivalence in Greenwich mean time
Greenwich mean time GMT = Eastern Daylight Savings Time + 4
substituting known values
Greenwich mean time = 1 : 31 : 45 PM + 4
Greenwich mean time = 5 : 31 : 45 PM
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Evaluate
-1/3 - (-6/5)
SIMPLEST FORM
Answer:
13/15
Step-by-step explanation:
Step 1) Convert to -5/15 - (-18/15)
Step 2) -5/15 - (-18/15)= 13/15
Part 0
Calculate the ratio of the lengths of the two line segments formed on each transversal. You will have
two sets of calculations. Round your answers to the hundredths place. What do you notice about the
ratios of the lengths for each transversal? How do they compare?
The ratio of the segments formed on each transversal are equal.
AB/CB = EF/DF
How do parallel lines work?
In terms of geometry, parallel lines are two separate lines that never cross each other and are located in the same plane. They may be vertical or horizontal.
The equation of the parallel lines are;
y = x, and y = x + 1
The point of intersection of transversal 1 and the parallel lines y, and z
(0.2, 0.2), and (0.3, 0.8)
The length of segment AB = √((0.3 - 0.2)² + (0.8 - 0.2)²) = 0.1·√(37)
The point of intersection of transversal 1 and the parallel lines x, and y
(0.3, 0.8), and (0.4, 1.4)
The length of segment CB = √((0.4 - 0.3)² + (1.4 - 0.8)²) = 0.1·√(37)
The ratio of the lengths of the line segments formed by the transversal 1, AB:CB is found as follows;
AB/CB = 0.1 . √37/ 0.1 . √37 = 1
The point of intersection of transversal 2 and the parallel lines y and z are;
(0.8, 0.8), and (0.7, 1.2)
The length of segment EF = √((0.7 - 0.8)² + (1.2 - 0.8)²) = 0.1·√(17)
The point of intersection of transversal 2 and the parallel lines x and y are;
(0.7, 1.2), and (0.6, 1.6)
The length of segment DE = √((0.6 - 0.7)² + (1.6 - 1.2)²) = 0.1·√17
The ratio of the lengths of the line segments formed by the transversal 2, EF:DE is found as follows;
EF/DF = 0.1 . √17/ 0.1 . √17 = 1
Therefore:
The ratio of the lengths of the two line segments formed on each transversal are equal.
AB/CB = EF/DF
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A recipe for banana bread uses 4 cups of bananas for every 8 cups of flour. How many cups of bananas are needed when 2 cups of flour are used?.
Answer:
1 cup of banana for 2 cups of flour
Step-by-step explanation:
Divide 4 cups of banana by 4 and 8 cups of flour by 4
Then you will get 1 cup of banana for 2 cups of flour
Which inference is incorrect?
The analysis of the logical statement from among the options indicates that the inference that is not true is the option;
If not p, not q. q therefore not not qWhat is a logical statement?A logical statement is one which draws a conclusion based on an hypothesis.
The logical statement which is incorrect can be found by examining the specified statements as follows;
If p then q,
The converse statement , found by switching the positions of the hypothesis and the conclusion is therefore;
q therefore p
The inference is correct
The statement, if not p, not q . q therefore not not p
According to the law of contraposition, a conditional statement is true when the contrapositive statement is also true.
The statement if not p, not q. which is the contrapositive of the statement if q then p
The inference, q, therefore not not q is incorrect
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how do i find the maximum value of the function
Answer:
The maximum value of a function can be found at its highest point, or vertex, on a graph
Step-by-step explanation:
~Describe the transformation, by giving the coordinate rule.
7.) (x,y) --> (______,_______)
Answer:
(-x,y)
Step-by-step explanation:
The height (in centimeters) of a candle is a linear function of the amount of time (in hours) it has been burning. When graphed, the function gives a line with a slope of "-0.5" . See the figure below. Suppose that the height of the candle after 19 hours is 16.5 centimeters. What was the height of the candle after 11 hours?
The height of the candle after 11 hours is 20.5 if the slope is -0.5.
What is a slope?The ratio of "vertical change" to "horizontal change" between any two separate points on a line, or any two points, is used to compute slope. When the ratio is expressed as a quotient ("rise over run"), the same number is provided for every two distinct locations on the same line. There is a negative "rise" on a descending line. The line may be practical, as determined by a road surveyor, or in a diagram that represents a roof or a road as a description or a design.
The absolute value of the slope serves as a proxy for a line's steepness, incline, or grade.
Given, slope m= -0.5
(y-y₁)=m(x-x₁)
Also given that,
x=19, y=16.5 cm
(y-16.5)=m(x-19)
y-16.5= -0.5(x-19)
y-16.5= -0.5x+9.5
0.5x+y-26=0
After 11 hours, the height of the candle is:
x=11
0.5(11)+y-26=0
y=26-5.5
y=20.5
Therefore, the height of the candle after 11 hours is 20.5
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the population of bulford was 16,200 in 2010 and 13,824 in 2016. find the rate of change
the slope goes by several names
• average rate of change
• rate of change
• deltaY over deltaX
• Δy over Δx
• rise over run
• gradient
• constant of proportionality
however, is the same cat wearing different costumes.
[tex]\begin{array}{|cc|ll} \cline{1-2} \stackrel{x}{year}&\stackrel{y}{population}\\ \cline{1-2} 2010&16200\\ 2016&13824\\ \cline{1-2} \end{array}\hspace{5em} (\stackrel{x_1}{2010}~,~\stackrel{y_1}{16200})\qquad (\stackrel{x_2}{2016}~,~\stackrel{y_2}{13824}) \\\\\\ \stackrel{slope}{m}\implies \cfrac{\stackrel{rise} {\stackrel{y_2}{13824}-\stackrel{y1}{16200}}}{\underset{run} {\underset{x_2}{2016}-\underset{x_1}{2010}}} \implies \cfrac{ -2376 }{ 6 } \implies \text{\LARGE -396} ~~ \textit{per year}[/tex]
An organic food company need to paint it new ilo. The ilo i a cylinder with a height of 24 yard and a bae 3 yard in diameter. The paint the company ha elected will cover 150 quare feet per gallon. How many gallon of paint will be needed to paint the top and lateral urface of the ilo?
To calculate the total area of the cylinder, we need to use the formula for calculating surface area; SA = 2πr² + 2πrh. In this case, r is equal to 1.5 yards and h is equal to 24 yards:
SA = 2(3.14)(1.5^2) + (2)(3.14)(1.5)(24)
= 28 ft² + 144 ft²
= 172 ft²
Therefore, we need 172/150 gallons of paint in order to cover both sides of the ilo with one coat each - approximately 1 gallon and 14 fluid ounces or about 1 3/4 gallons of paint will be needed in total
What is Surface Area?
The area is the area occupied by a flat, two-dimensional surface. It is expressed in square units. The surface area of a three-dimensional object is the space taken up by its exterior surface.
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originally, What is the estimated age of the artifact? (The half-life of 7. An archeologist finds an artifact that contains 44% of the carbon-14 that it would have had carbon-14 is 5,730 years.)
Answer: To determine the estimated age of the artifact, we can use the half-life of carbon-14 and the percentage of carbon-14 that is present in the artifact.
The half-life of carbon-14 is the amount of time it takes for half of the carbon-14 in a sample to decay. In this case, the half-life of carbon-14 is 7,730 years.
The percentage of carbon-14 that is present in the artifact is 44%. This means that the artifact contains 44% of the carbon-14 that it would have had when it was originally made.
To determine the age of the artifact, we can use the formula:
age = (half-life / log(2)) * log(percentage of carbon-14 / 100)
Substituting the values from the problem into the formula, we get:
age = (7,730 years / log(2)) * log(44% / 100)
age = (7,730 years / 0.693) * log(0.44)
age = 11,095 years * (-0.847)
age = -9,432 years
Therefore, the estimated age of the artifact is -9,432 years.
It is important to note that this is just an estimate, and the actual age of the artifact may be different. Carbon-14 dating is only accurate up to a certain point, and the accuracy of the age determination depends on several factors, including the initial concentration of carbon-14 in the sample and the presence of any contaminants.
Antonio bought 3 medium and 2 large submarine sandwiches for a total of $29.95 Sophie spend $28.45 on her purchase of 4 and 1 large submarine sandwiches. find the cost of each medium sandwich and each large sandwich.
price of a medium submarine sandwich $
price of a large submarine sandwich $
Answer:
medium is 5 dollars and 39 cents
large is 6 dollars and 89 cents
Step-by-step explanation:
3m + 2l = 29.95
4m + l = 28.45
3m + 2l = 29.95
8m + 2l = 56.9
-5m = -26.95
5m = 26.95
m = 5.39
3(5.39) + 2l = 29.95
16.17 + 2l = 29.95
2l = 13.78
l = 6.89
The product of four consecutive positive integers is 1 less than $461^2$. What is the least of these four numbers?.
Therefore, 20 is the lowest of the four numbers.
What is integers ?An integer, which can comprise both positive and negative integers, including zero, is a number without a decimal or fractional portion.
Integers include things like -5, 0, 1, 5, 8, 97, and 3,043. Z is a set of integers that consists of the following:
Positive, negative, and zero are all examples of integers.
The Latin word "integer" signifies "whole" or "intact." Thus, fractions and decimals are not included in integers.
According to our question-
4 numbers added together yields the product 4612 - 1.
The least of the four integers is the required information. Let N-2, N-1, N, and N + 1 be the numbers.
According to our calculations
, (N - 2)(N)(N + 1)(N - 1) = 4612 - 1 (N - 2)(N)(N + 1)(N - 1)- (4612 - 1) = 0
This results in N4 - 2N3 - N2 + 2N - 212520 = 0.:
(N + 21)(N - 22)(N2 - N + 460) = 0. N = 22 or -21 are hence potential solutions. However, the necessity for positive integers results in
N = 22 as a potential solution.
Because of this, where the four numbers are N-2, N-1, N, and N + 1, we get the following numbers:
22 -2, 22 -1, 22 + 1, which equals
20, 21, 22, and 23.
Therefore, 20 is the lowest of the four numbers.
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13. Find the slope and a point on the line for the lines with the following equations
a. y - 9=-3/4(x - 4)
b. y = 3 - 2/3 (x +4)
The slopes and points are:
a) (-3/4) and the point is (4, 9)
b) (-2/3), and the point is (-4, 3)
How to identify the slope and point on these lines?
A line with a slope a and a known point (h, k) can be written as:
y - k = a*(x - h)
So that is the slope-point form of the linear equation.
a) The first linear equation is:
y - 9 = (-3/4)*(x - 4)
Comparing this with the general line above, we can see that the slope is (-3/4) and the point is (4, 9)
b) y = 3 - 2/3 (x +4)
We can rewrite this as:
y - 3 = -(2/3)*(x + 4)
Then in this case the slope is (-2/3), and the point is (-4, 3)
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During a walkathon, Team A walks total 6x+12 miles and Team B walks a total of 4x-7 miles. What is the difference in miles walked between the two teams?
Difference in miles walked between 2 teams is 2x+12.
Team A walks total of 6*x+12 miles.
let's suppose Team A walks y1 miles
y1 = 6*x+12.
Team B walks total of 4x-7 miles
let's suppose Team B walks y2 miles
y2 = 4*x-7
Let's understand what means by difference?
One of the most crucial mathematical operations, which is obtained by removing two numbers, produces difference in mathematics. It reveals how much one number deviates from another. To determine how many numbers are between the two given numbers is the goal of finding the difference in math.
Difference in miles walked between 2 teams
= y1-y2.
= 6x+12-(4x-7)
= 6x+12-4x+7
=2x+12
So the difference in miles walked between 2 teams is 2x+12.
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The area of a right Triangle is 30 sq.cm and it’s perimeter is 30cm. If it’s hypotenuse is 13cm, what are the lengths of the other two sides?
Answer:
either h=12, b=5
or h=5, b=12
Step-by-step explanation:
We'll use a system of equations to solve this. We'll have 2 equations and 2 unknowns. Our 2 unknowns are the 2 other sides, and our 2 equations are as follows:
look for any information given. I see that the area is 30 sq.cm and the perimeter is 30cm. There are our pieces of information.
Our first equation will be the one about how the area is 30 sq.cm (we'll use b for base and h for height:
(1/2)×b×h=30
Our second equation will be the one about how the perimeter is 30cm:
13+b+h=30
These equations both have to be true at the same time, and there are a few techniques for solving a system of equations, but in this case, this way is probably the simplest. We'll get one variable on one side of an equation and then plug it into the other equation using the transitive property.
13+b+h=30
b=30-13-h
b=17-h
now we'll plug in (17-h) for all the b in the first equation:
(1/2)×(17-h)×h=30
17h-h²=60
-h²+17h-60=0
now we'll use quadratic formula (or factor) to find h:
[-17±√(289-240)]/-2
(-17±7)/-2
-24/-2 or -10/-2
12 or 5
h=12
h=5
we'll try both of them in this equation:
13+b+h=30
25+b=30
or 18+b=30
therefore;
either h=12, b=5
or h=5, b=12
with the correct sampling method, you expect to obtain a sample mean exactly the same as the population mean. t or f
False. While using the right sampling technique can increase the probability of getting sample mean values that are close to population mean values.
What is the mean of population?A population is the entire set of people in a group, whether that group is a country or a collection of people who share a certain trait. A population is the group of people from which a statistical sample is taken in statistics.
What is population mean and sample mean?The sample mean is the mathematical average of values selected at random from the population. The population mean is a representation of the population's real mean.
It is impossible to ensure that the sample mean and population mean will be a perfect match. This is because sampling has intrinsic variability and randomness, which can cause discrepancies between the sample and the population even in studies that are carefully planned. Additionally, there could still be some variability or error in the estimates even if the sample mean is quite near to the population mean, which might have an impact on the accuracy of the findings.
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There is such a positive integer: if it is divided by 5, the remainder is 3; if it is divided by 6, the remainder is 4; if it is divided by 7, the remainder is 1. Find the least possible value of such number.
Answer:
The least possible number is 148---------------------------------------------------
Let the number be N.
If N is divided by 5 the remainder is 3:
N = 5k + 3,Similarly:
N = 6p + 4,N = 7q + 1.We can observe N + 2 is divisible by both 5 and 6, then it can be represented as:
N + 2 = 30m,so
30m = 7q + 1 + 2 or30m - 3 = 7qThe left side is divisible by 3, then q = 3t:
30m - 3 = 7*3t10m - 1 = 7tThe least m and t would be m = 5 and t = 7.
Then:
N + 2 = 30*5 = 150 ⇒ N = 148 is the least possible number.Proof:
148/5 = 29 (rem 3)148/6 = 24 (rem 4)148/7 = 21 (rem 1)A pebble is tossed into the air from the top of a cliff. The height of the pebble over time is modeled by the equation y = -16x2 + 32x + 80. What is the maximum height, in feet, reached by the pebble?
In linear equation, x = 1 is the maximum height, in feet, reached by the pebble.
What in mathematics is a linear equation?
A linear equation is a first-order (linear) term plus a constant in the algebraic form y=mx+b, where m is the slope and b is the y-intercept.
Sometimes, the aforementioned is referred to as a "linear equation of two variables," where x and y are the variables.
The height of the pebble over time is modeled by the equation
y = -16x2 + 32x + 80
At the maximum height, the final velocity of the pebble is zero.
The velocity of the pebble will be obtained by taking the derivative of the given equation.
That is
y' = dy/dx
= d/dx (-16x2 + 32x + 80 )
= -32x + 32
At the maximum height, y' = 0 .
So,
-32x + 32 = 0
32x = 32
x = 32/32
x = 1
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Kiran is going to invest $6,600 and leave it in an account for 8 years. Assuming the
interest is compounded daily, what interest rate, to the nearest hundredth of a
percent, would be required in order for Kiran to end up with $9,500?
Answer:
Step-by-step explanation:1.08%
Interest rate required in order for Kiran to end up with $9,500 is 4.55%.
What is Compound Interest?Compound interest is defined as the amount of interest which has been calculated on the principal amount as well as the amount accumulated over the previous period is also included.
Given,
Principal amount = $6,600
Time in years = 8 years
Final amount = $9,500
The final amount is calculated in compound interest by the formula,
A = P (1 + [tex]\frac{r}{n}[/tex]) ^ (n t)
Here, P is the principal amount, r is the rate of interest, n is the number of years.
Substituting in the formula,
9500 = 6600 (1 + [tex]\frac{r}{365}[/tex]) ^(365 × 8)
9500 / 6600 = (1 + [tex]\frac{r}{365}[/tex])²⁹²⁰
1.4394 = (1 + [tex]\frac{r}{365}[/tex])²⁹²⁰
1.000125 = 1 + [tex]\frac{r}{365}[/tex]
[tex]\frac{r}{365}[/tex] = 0.00125
r = 0.045531
r = 4.5531% ≈ 4.55%
Hence the interest rate to the nearest hundredth of a percent is 4.55%.
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