Ratio is the relation between two amounts that shows the number of times one value contains within the other.
What is Ratio?
A ratio in mathematics illustrates how many times one number contains another. For example, if a dish of vegetables contains eight tomato and six carrots, the tomato-to-carrot ratio is eight to six (that is, 8:6, which is equivalent to the ratio 4:3). Similarly, the proportion of carrots to tomato is 6:8 (or 3:4), while the proportion of tomato to overall fruit is 8:14. (or 4:7). A ratio's numbers can be any quantity, such as a count of persons or things, or measures of lengths, weights, time, and so forth. In most situations, both numbers must be positive.
Ratio is the relation between two amounts that shows the number of times one value contains within the other.
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Solve 4(x - 3) - 2(x - 1) > 0. (10 points)
1. (x | x < -5)
2. (x | x > -5)
3. (x | x > 5)
4. (x | x < 5)
Answer:
3. (x | x > 5)
Step-by-step explanation:
To solve this inequality, we need to isolate the variable on one side and the constant on the other side. To do this, we need to use the properties of inequalities and the order of operations to manipulate the given inequality into a form we can solve.
First, we need to distribute the coefficients in front of the parentheses on the left-hand side of the inequality. This gives us:
4x - 12 - 2x + 2 > 0
Next, we can combine like terms on the left-hand side of the inequality by adding the terms with the variable and subtracting the constant terms. This gives us:
2x - 10 > 0
Now, we have isolated the variable on one side of the inequality and the constant on the other side. To solve the inequality, we need to determine the values of x that make the inequality true.
To do this, we can divide both sides of the inequality by the coefficient of the variable, which gives us:
x - 5 > 0
This inequality is satisfied when x is greater than 5. Therefore, the solution to the original inequality is x > 5.
The histogram shows a distribution of average daily steps in a gym class.
Which statement best describes the distribution?
A. The data is positively skewed because the majority of the data is clustered to the left of the center.
B. The data is negatively skewed because the majority of the data is clustered to the left of the center.
C. The data is normally distributed because the majority of the data is in the center.
D. The data does not support any distribution trend.
The statement that best describes the distribution is C. The data is normally distributed because the majority of the data is in the center.
What is the histogram about?A histogram is a graphical representation of data points organized into ranges that the user specifies. The histogram, which resembles a bar graph in appearance, condenses a data series into an easily interpreted visual by grouping many data points into logical ranges or bins.
Because the majority of the data is in the center, the data is normally distributed.
Data in a normal distribution are symmetrically distributed and have no skew. The majority of values cluster around a central region, with values decreasing as one moves away from the center. In a normal distribution, the measures of central tendency (mean, mode, and median) are identical.
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Suppose △ABC has coordinates A(2, 3), B(5, 1), C(4, 4), and △ABC is mapped to △A′B′C′ by a reflection across the line y = 5 followed by a translation 1 unit down. select all the statements that are true about the coordinates of △A′B′C′.
The coordinates of A' = (1, 7)
The coordinates of B' = (4, 9)
The coordinates of C' = (3, 6)
What is a reflection?There are two ways of translation.
Along x-axis:
(x, y) – (x, -y)
Along y-axis:
(x, y) - (-x, y)
We have,
ΔABC:
Coordinates:
A = (2, 3)
B = (5, 1)
C = (4, 4)
Reflection across y = 5.
So,
A = (2, 5)
There are two units between y = 5 and y = 3.
We add 2 units with the y-coordinate of A = (2, 5)
5 - 3 = 2
So,
A = (2, 5 + 2)
A = (2, 7)
Similarly,
5 - 1 = 4
B = (5, 5 + 4) = (5. 9)
5 - 4 = 1
C = (4, 5 + 1) = (4. 6)
Translation of 1 unit down.
A = (2 - 1, 7) = (1, 7)
B = (5 - 1, 9) = (4, 9)
C = (4 - 1, 6) = (3, 6)
Thus,
The coordinates of ΔA'B'C' are (1, 7), (4, 9), and (3, 6).
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The students in a gym class measured the length of their longest jump (in feet). The results were tallied and are reported in the following histogram. How many students jumped greater than 8.5 but less than 11.5 feet?
On solving the provided question we can say that, Number of students jumped greater than 8.5 but less than 11.5 is 7 students.
What is frequency?the frequency or reality that something occurs frequently or a great number of times within a specific time frame. The frequency of buses, for instance, has been the subject of more complaints in recent months.
Number of students jumped greater than 8.5 but less than 11.5= frequency of length of jump greater than 8.5 but less than 11.5
AND,
frequency of length of jump greater than 8.5 but less than 11.5 is -
Number of students jumped greater than 8.5 and less than 9.5 + Number of students jumped greater than 9.5 but less than 10.5 + Number of students jumped greater than 10.5 but less than 11.5=
3+3+1=7 ( since, sum of respective frequencies of the three class)
so, Number of students jumped greater than 8.5 but less than 11.5 is 7 students.
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an independent group of food service personnel conducted a survey on tipping practices in a large metropolitan area. they collected information on the percentage of the bill left as a tip for 25 randomly selected bills. the average tip was 12.4% of the bill with a standard deviation of 2.4%. assume that the tips are approximately normally distributed. construct an interval to estimate the true average tip (as a percent of the bill) with 95% confidence. round the endpoints to two decimal places, if necessary.
We calculated the required interval is 13.341 and 11.46 to estimate true average.
What is confidence level?
It is a statistical term that express that the value of a specific parameter located within a boundary.
What is confidence interval?
A statistical expression that has upper and lower limit. This value gives assurances to the average or mean value to be within the limit.
Given, number of samples, n =25
sample standard deviation, σ = 2.4%
average tip = sample mean, X = 12.4%
confidence level =95%
We need to construct an interval to estimate the true average tip with 95% confidence level.
We know that confidence level value Zc for 95% = 1.96
Now, confidence interval CI = X±Zc (σ/√n)
by putting the given value, CI= 12.4±1.96(2.4/√25)
the interval is 13.341 and 11.46
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1) If all the principal determinants of a symmetric matrix are negative, then the symmetric matrix is negative definite. (TRUE OR FALSE)
On solving the provided question we can say that, True -When a symmetric matrix's primary determinants are all negative, the symmetric matrix is said to be negative definite.
What is matrix ?When integers are arranged in rows and columns, they form a matrix. learns about matrices' dimensions and components for the first time. Numerals are arranged in rows and columns in a rectangular matrix. Consider the two rows and three columns of matrix A.
m rows and n columns make up the m by n matrix. It is common practice to use a variable with two subscripts to represent each member of a matrix. As an illustration, a2,1 denotes the matrix element that is located in row 2, column 1.
When a symmetric matrix's primary determinants are all negative, the symmetric matrix is said to be negative definite.
True
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4) Describe the continuity or discontinuity of the graphed function.
If the system of the linear equations above has infinitely many solutions, and c is a constant, what is the value of c?
A) - 6
B) - 3
C) - 2
D) - 1
Option D is the correct answer. The value of 'c' for the given system of linear equations with infinitely many solutions is - 1.
A linear equation is an equation in which the highest power of the variable is always 1 and the equations are the equations of degree 1. It is the equation for the straight line.
The standard form of the linear equation is ax+by+c =0
where a ≠ 0 and b ≠ 0.
Given a system of linear equations are
1. 3x-9y=-6
⇒ x-3y=-2
Therefore,
a1=1, b1=-3, c1=-2
2. [tex]\frac{x}{2} -\frac{3y}{2} =c\\[/tex]
⇒ x-3y=2c
Therefore,
a2=1, b2=-3, c2=2
For the system of linear equations with infinitely many solutions,
compare c1=c2
2c=-2
⇒ c=-1
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How many solutions does the following system of equations have? Show your reasoning.
4x+6y= 24
2x+3y=12
infinitely many solutions because these 2 lines are exactly the same line. If you multiply the 2nd equation by 2, you will get the 1st one, or if you divide the 1st equation by 2, you will get the 2nd one.
pecan theatre inc. owns and operates movie theaters throughout florida and georgia. pecan theatre has declared the following annual dividends over a six-year period: year 1, $80,000; year 2, $90,000; year 3, $150,000; year 4, $150,000; year 5, $160,000; and year 6, $180,000. during the entire period ended december 31 of each year, the outstanding stock of the company was composed of 250,000 shares of cumulative, preferred 2% stock, $20 par, and 500,000 shares of common stock, $15 par
The table for (a) for preferred stock and (b) for common stock based on the average annual dividend per share has been done.
a) Data and Calculations:
Dividends: Cumulative Common Stock
Preferred Stock Dividends
Dividends Per share Per share
20Y1, $80,000 $80,000 $0.40 $0 $0
20Y2, $90,000 90,000 $0.40 0 $0
20Y3, $150,000 150,000 $0.40 0 $0
20Y4, $150,000 100,000 $0.40 50,000 $0.10
20Y5, $160,000 100,000 $0.40 60,000 $0.12
20Y6, $180,000 100,000 $0.40 80,000 $0.16
b)Average annual percentage return
Cost Market 20Y1 20Y2 20Y3 20Y4 20Y5 20Y6
per share
Preferred stock $20.00 $25.00 2% 2% 2% 2% 2% 2%
Common stock $15.00 $17.50 0% 0% 0% 0.7% 0.8% 0.11%
Thus, the average annual percentage return is Dividend per share/Initial Cost per share
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Suppose that grade point averages of undergraduate students at one university have a bell-shaped distribution with a mean of 2.62 and a standard deviation of 0.43. Using the empirical rule, what percentage of the students have grade point averages that are at least 3.48? Please do not round your answer.
The percentage of students that have grade point averages that are at least 3.48 is of:
2.5%.
What is defined by the Empirical Rule?These approximate percentages are defined by the Empirical Rule, for a normally distributed variable:
68% of the measures within one standard deviation of the mean.95% of the measures within two standard deviation of the mean.99.7% of the measures within three standard deviation of the mean.Considering the mean of 2.62 and the standard deviation of 0.43, a grade point average of at least 3.48 is at least two standard deviations above the mean.
100 - 95 = 5% of the measures are at least two standard deviations of the mean. Considering the symmetry of the normal distribution, we have that:
2.5% of the measures are at least 2 standard deviations below the mean.2.5% of the measures are at least 2 standard deviations above the mean. -> At least 3.48.More can be learned about the Empirical Rule at brainly.com/question/10093236
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Here are two steps from the derivation of the quadratic formula.
x² + b10
2a
=
b
+
a 2a
b
(x + 2)² --- + ( 2 )²
2a
a 2a
What took place between the first step and the second step?
OA. Factoring a perfect square trinomial
OB. Taking the square root of both sides
OC. Completing the square
Answer:
The correct answer is C) Completing the square.
Step-by-step explanation:
In the first step of the derivation, the left-hand side of the equation is the standard form of a quadratic equation, with the variable x raised to the second power and the coefficient of x being 1. In the second step, the expression on the left-hand side is rewritten as the square of a binomial, with the constant term b/2a added to the binomial. This process of adding the constant term and then squaring the resulting binomial is called "completing the square." By completing the square, it is possible to rewrite the original quadratic equation in a form that can be easily solved using the quadratic formula.
what is 1/9 divided by 7
1/63.
Step-by-step explanation:1. Write the expression.[tex]\frac{\frac{1}{9} }{7}[/tex]
2. Apply the fraction rules.Check the attached image below.
[tex]\frac{1}{9}*\frac{1}{7}[/tex]
3. Simplify.[tex]\frac{1}{9}*\frac{1}{7}=\\\\ \frac{1*1}{9*7} =\\\\ \frac{1}{63}[/tex]
4. Conclude.[tex]\frac{\frac{1}{9} }{7}=\frac{1}{63}[/tex]
estimate the age of a bone if it now contains 70% of its original amount of carbon-14. round to the nearest 100 years
The required age of the bone is approximately 8,200 years.
To estimate the age of a bone that now contains 70% of its original amount of carbon-14, you can use the formula:
age = (half-life / log(2)) x log(original amount / current amount)
In this case, the original amount of carbon-14 is 100% and the current amount is 70%, so the age of the bone can be calculated as:
age = (5730 years / log(2)) x log(100% / 70%)
age = (5730 years / 0.693) x 0.35667
age = 8268 years
Rounded to the nearest 100 years,
age = 8200 years
Therefore, the bone is estimated 8,200 years old.
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suppose that you want to describe the relationship between operating cost per hour and number of passenger
The operating cost per hour of a plane increases with the number of passengers it carries. More passengers require more fuel, maintenance, and staff, which all increase the overall cost of operating the plane per hour.
Additionally, if the plane is larger and designed to carry more passengers, the operating cost per hour may be higher than for smaller planes.The cost of operating an aircraft per hour is directly related to the number of passengers it carries. As the number of passengers increases, so too does the amount of fuel, maintenance, and personnel needed to safely operate the plane, resulting in a higher operating cost per hour. Additionally, larger planes that can carry more passengers also tend to have higher operating costs per hour than smaller planes.
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Find the domain and range of the function represented by the graph.
Answer:
D = [1,5]
R= [0,4]
.........
CALC HOMEWORK/ TRIG HW
Answer:
[tex]45^{\circ}[/tex]
Step-by-step explanation:
This is a standard result.
A survey of 1,026 people asked: 'What would you do with an unexpected tax refund?' Forty-seven percent responded that they would pay off debts (Vanity Fair, June 2010). Use Table 1. a. At 95% confidence, what is the margin of error? (Round your intermediate calculations to 4 decimal places, "z" value to 2 decimal places, and final answer to 3 decimal places.) Margin of error b. Construct a 95% confidence interval of the population proportion of people who would pay off debts with an unexpected tax refund. (Use rounded margin of error. Round your answers to 3 decimal places.) Confidence interval to
The margin of error at 95% confidence is 0.046., the 95% confidence interval of the population proportion of people who would pay off debts with an unexpected tax refund is (0.424, 0.516).
What is margin of error?The margin of error is a statistical measure of the variability of a sample statistic from its population value. It is calculated by taking the standard error of the statistic and dividing it by the sample size. It is typically expressed as a percentage and is used to measure the precision of the sample statistic compared to the population statistic. Margin of error is primarily used in confidence intervals to measure the accuracy of survey results. It is also used to measure the impact of random sampling error on the statistical significance of the results.
a. Margin of Error: The margin of error is calculated using the formula Margin of Error = z* (√p*(1-p)/n), where z is the z-score for the 95% confidence interval (1.96), p is the sample proportion (0.47), and n is the sample size (1,026).
Plugging in the values, we get Margin of Error = 1.96 * (√0.47*(1-0.47)/1,026) = 0.046.
Therefore, the margin of error at 95% confidence is 0.046.
b. Confidence Interval: The confidence interval is calculated using the formula Confidence Interval = (p-margin of error, p+margin of error), where p is the sample proportion (0.47) and margin of error is the margin of error (0.046).
Plugging in the values, we get Confidence Interval = (0.47 - 0.046, 0.47 + 0.046) = (0.424, 0.516).
Therefore, the 95% confidence interval of the population proportion of people who would pay off debts with an unexpected tax refund is (0.424, 0.516).
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a circular spinner is divided into 10 sectors of equal area: 2 red sectors, 3 blue, 4 yellow, and 1 green. find p(blue) on a single spin.
Answer:
3/10
Step-by-step explanation:
There are 3 blue sectors out of the total 10.
I NEED HELP ASAP PLS
For the given circle the value of cotθ is -√30/√19.
What is Trigonometry?Trigonometry is a branch of mathematics that studies relationships between side lengths and angles of triangles.
The terminal side of an angle θ.
The standard position intersects the unit circle at (√30/7, -√19/7).
We need to find the value of cotθ.
Suppose that θ is an angle in standard position whose terminal side intersects the unit circle at (√30/7, -√19/7)
cotθ=x/y
=-√30/7/√19/7
=-√30/7×7/√19
=-√30/√19
Hence, the value of cotθ is -√30/√19 for the given circle.
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Determine whether or not the given set is (a) open, (b) connected, and (c) simply-connected. 31. {(x, y) | 0
This set {(x, y) | 0 is (a) open, (b) connected, and (c) not simply-connected.
(a) Open: This set is open because all points within the set have a neighborhood that is also within the set.
(b) Connected: This set is connected because there is a path between any two points in the set that does not leave the set.
(c) Not simply-connected: This set is not simply-connected because it contains a hole in the center, which is not a simply-connected space.
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The number 21 is 3.5% of what?
Answer:
The number 21 is 3.5% of 600---------------------------
Let the number be x.
Set equation for x and solve:
3.5% of x is 21x*3.5/100 = 21x = 21*100/3.5x = 600The hypotenuse of a 30°-60°-90° triangle has a length of 12 cm. Which could be the length of a leg of the triangle?
A. 8 cm
0
B. 10 cm
C. 6 cm
OD 6√3 cm
Answer:
C and D are correct.
Step-by-step explanation:
In a 30°-60°-90° triangle, the length of the hypotenuse is twice the length of the shorter leg, and the length of the longer leg is √3 times the length of the shorter leg.
Differentiate each function with respect to x.
I need the step. The answer is A
The differentiation for the given function is f'(x) = -27x⁸- 48x³. The correct option is (A).
What is differentiation?The differentiation of a function is defined as rate of change of its value at a point. It can be written as f'(x) = (f(x + h) - f(x)) /(x + h - x).
Geometric meaning of it is the slope of the function at a given point.
The given function is f(x) = (-x⁵ - 4). 3x⁴
It is in the form of u.v, the differentiation is given as below,
uv' + vu'
As per the above expression suppose (-x⁵ - 4) = u and 3x⁴ = v.
Now, the differentiation can be done as follows,
f'(x) = d(-x⁵ - 4)/dx × 3x⁴ + (-x⁵ - 4) × d(3x⁴)/dx
= -5x⁴ × 3x⁴ + (-x⁵ - 4) × 4 × 3x³
= -15x⁸ + 12x³(-x⁵ - 4)
= -15x⁸ - 12x⁸ - 48x³
= -27x⁸- 48x³
Hence, the differentiation is obtained as f'(x) = -27x⁸- 48x³.
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The graph of a line is shown on the grid. The coordinates of both points indicated on the graph of the line are integers.
What is the rate of change of y with respect to x for this line?
The rate of change of y with respect to x for this line is 4 / 5 .
Given :
The graph of a line is shown on the grid. The coordinates of both points indicated on the graph of the line are integers.
From the graph :
The marked coordinates are ( 5 , 7 ) and ( -5 , -1 ) .
slope m = rate of change of y / rate of change of x
= y2 - y1 / x2 - x1
= -1 -7 / -5 - 5
= -8 / -10
= 8 / 10
= 4 / 5
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a publisher reports that 75% of their readers own a particular make of car. a marketing executive wants to test the claim that the percentage is actually different from the reported percentage. a random sample of 200 found that 68% of the readers owned a particular make of car. state the null and alternative hypotheses. Determine the P value of the test statastic. Round your answer to four decimal places.
P value of the test statistic = 0.0220
NULL and alternative hypothesis
In statistical hypothesis testing, null and alternative hypotheses are used. A test's null hypothesis always predicts that there will be no effect or relationship between variables, whereas the alternative hypothesis states your research prediction of an effect or relationship.Given that,
p = 0.75
n =200
p^ = 0.68
Testing statistic;
p = 0.75
q = 1 - p
= 1 - 0.75
= 0.25
[tex]Z = \frac{p^ -p }{\sqrt{\frac{p.q}{n} } }[/tex]
= 0.68 - 0.75 / √(0.75 × 0.25)/200
= -2.2861
Z = -2 .29
p value = 2 × (Z ≤ -2.29 )
= 2 × 0.0110
p value = 0.0220
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Roll a fair die twice. Let A be the even that the sum of the two rolls equals six, and let B be the even that the same number comes up twice. What is P(A/B)?
The value of P(A/B) will be = 1/4
As per the question,
As a fair six-sided die is rolled twice
So, the total number of outcomes will be N=6^2=36
A: sum of the two rolls is 5
[tex]$$\begin{aligned}& A=\{(1,4),(2,3),(3,2),(4,1)\} \\& n(A)=4 \\& P(A)=\frac{n(A)}{N}=\frac{4}{36}\end{aligned}$$[/tex]
B: The first roll results in a 2
[tex]B=\{(2,1),(2,2),(2,3),(2,4),(2,5),(2,6)\}$ \\$n(B)=6$ \\$P(B)=\frac{n(B)}{N}=\frac{6}{36}$ \\$B \cap A=\{(2,3)\}$ \\$\cap(B \cap A)=1$ \\$P(B \cap A)=\frac{n(B \cap A)}{N}=\frac{1}{36}$\\$P(B \mid A)=\frac{P(B \cap A)}{P(A)}=\frac{1 / 36}{4 / 36}=\frac{1}{36} \times \frac{36}{4}$$P(B \mid A)=\frac{1}{4}$[/tex]
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round 94.59 to the nearest tenths
Answer:
94.6
Step-by-step explanation:
What is the measure of
A. 116°
B. 25°
C. 62°
D. 54°
Answer:
62 degrees
Step-by-step explanation:
(3x-13)+(2x+4)+(180-116)=180
5x-9+64=180
5x+55=180
-55. -55
5x=125
/5. /5
x=25
3(25)-13
75-13
62
hopes this helps
David saves money from his teaching job to buy a new boat when he retires in 20 years. The boat will cost $30,000. He has $12,000 in his simple interest savings account. To reach his goal by retirement, David should
Answer: move his money to a compound interest account
David ought to keep saving money in his simple interest account regardless of his current age.
He will be able to purchase his 30,000 USD boat at that rate each year. David would need to put at least 5 to 10 percent of his income into a savings account with simple interest.
Your initial investment as well as any interest that has already been accrued will earn interest in a compound interest account. The "compounding" factor is the appreciation of interest based on interest that occurs over time. On the other hand, simple interest accounts only pay interest on the initial principal.
Can a compound interest account result in a loss of funds?Both guaranteed and non-guaranteed substances benefit from compounding. You might lose all of your money or some of it. Stocks, income trusts, real estate, mutual funds, and gold are all examples.
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