Answers
supposed to questions
Step-by-step explanation:
people say the climate is changing
Related Questions
PLEASE HELP!! WILL GIVE BRAINLIEST AND 25 POINTS!!
Solve for x. Round your answer to the nearest tenth.
A. 11.5
B. 10.2
C. 12.0
Answers
Answer: 11.5
Step-by-step explanation:
[tex]\sin 35^{\circ}=\frac{x}{20}\\\\x=20 \sin 35^{\circ}\\\\x=11.5[/tex]
In this diagram, the area of the large square is equal to the combined areas of the tilted square and the four right triangles.
(the picture)
When written as an equation, this relationship can be simplified algebraically, as shown in these 4 steps.
Step 1: (a + b) (a + b) = c2+ 2ab
Step 2: a2 + 2ab + b2 = c2 + 2ab
Step 3: a2 + 2ab ─ 2ab + b2 = c2 + 2ab ─ 2ab
Step 4:
What equation fits in the box in Step 4 to complete the proof
(part B)
Builders use the equation from Part A to determine the number, height, and depth of stairs necessary to extend from the first floor to the second floor of a building.
Given that the ceiling is 12 feet high, stairs are 8 inches high and the stairwell is 16 feet long, describe in detail how a builder could use the equation to determine the number, height, and depth of the stairs.
Answers
Answer:
Step-by-step explanation:
You have two instruments with which to measure the height of a tower. If the true height is 100 meters, measurements with the first instrument vary with mean 100 meters and standard deviation 1. 2 meters. Measurements with the second instrument vary with mean 100 meters and standard deviation 0. 85 meter. You make one measurement with each instrument. Your results are X1 for the first and X2 for the second, and are independent. A) To combine two measurements, you might average them, Y=(X1+X2)/2. What are the mean and standard deviation of Y? b) It makes sense to give more weight to the less variable measurement because it is more likely to be close to the truth. Statistical Theory says that to make the standard deviation as small as possible you should weight X2 is very close to half the variance of X1, so X2 should get twice the weight of X1. That is, use W=1/3X1 + 2/3X2 What are the mean and standard deviation of W?
Answers
(a) The mean of Y is 100 meters, and the standard deviation of W is approximately 0.7348 meters.
(b) The mean of W is 100 meters, and the standard deviation of W is approximately 0.6935 meters.
a) To find the mean and standard deviation of Y, where Y = (X₁ + X₂) / 2, we use the properties of the mean and variance of a sum of independent random variables.
Mean of Y:
The mean of Y is simply the average of the means of X₁ and X₂, as the measurements are independent and have the same true height of 100 meters.
Mean(Y) = (Mean(X₁) + Mean(X₂)) / 2 = (100 + 100) / 2 = 100 meters
The standard deviation of Y:
When adding or subtracting independent random variables, the variances add up. Since the measurements are independent, we can use the formula:
Var(Y) = Var((X₁ + X₂) / 2) = (Var(X₁) + Var(X₂)) / 4
Now, calculate the variance of Y:
Var(Y) = (1.2² + 0.85²) / 4 ≈ 0.54
Standard deviation(Y) = √Var(Y)
≈ √0.54
≈ 0.7348 feet
b) Now, let's find the mean and standard deviation of W, where W = (1/3)X₁ + (2/3)X₂.
Mean of W:
Mean(W) = (1/3) * Mean(X₁) + (2/3) * Mean(X₂)
= (1/3) * 100 + (2/3) * 100
= 100 meters
The standard deviation of W:
To calculate the standard deviation of W, we need to find the variance of W and then take its square root.
Var(W) = (1/3)² * Var(X₁) + (2/3)² * Var(X₂)
= (1/9) * 1.2² + (4/9) * 0.85²
Now, calculate the variance of W:
Var(W) = 0.0181 + 0.1956 =0.481
Standard deviation(W) = √Var(W)
≈ √0.481
≈ 0.6935 meters
So, the mean of W is 100 meters, and the standard deviation of W is approximately 0.6935 meters.
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Damian was out at a restaurant for dinner when the bill came. His dinner came to $26. He wanted to leave a 31% tip. How much was his meal plus the tip, before tax, in dollars and cents?
Answers
Answer:
34 dollars and 6 cents
Step-by-step explanation:
1 percent = 0.26
0.26 x 31 = 8.06
26 + 8.06 = 34 dollars and 6 cents
I believe it is 34.06
Triangle KJL is similar to triangle HGI what is the length of HG
Answers
Answer:
3.75mm
Step-by-step explanation:
4.5/3=1.5
1.5(2.5)=3.75
the ratios are the same
What is the answer i need answers now I'm am going to fail
pls explain to
Answers
Answer:
Step-by-step explanation:
It is not a prime factorization because the term 8 is common multiplied by 2 and the line has 2 elevated to 3 that itselt is 8.
A prime factorization should be stay equal without any commom multiples.
2. Fill in the blanks to factor the trinomial 3x² + 13x - 10 by grouping.
3x² + 13x - 10 = 3x² -
=
3x²-x+.
_X+X-10
(3x - 2) +(3x - 2)
+
)(3x - 2)
Answers
Answer:
-2 and 15x and 5x and 5Step-by-step explanation:
You want the steps involved in factoring 3x² +13x -10 by grouping.
FactorsTo fill in the blanks, you need to know the product of the first and last coefficients, and the factor pairs of that product that have a sum equal to the middle coefficient.
3(-10) = -30 = (-1)(30) = (-2)(15) = (-3)(10) = (-5)(6)
The sums of these factor pairs are 29, 13, 7, 1. The sum of interest is ...
-2 + 15 = 13
These are the values that go in the first pair of blanks.
= 3x² -2 x + 15 x -10
Factors of pairsWe want to identify the common factor for each pair of terms:
= x (3x -2) + 5 (3x -2)
Factored trinomialFinally, the common factor (3x -2) is removed and we have ...
= ( x + 5 )(3x -2)
Reflect TIY across y=x to map onto DOG.
(PLEASE HELP!)
Answers
The coordinates will be after applying the transformation, I(-5,0) --I'(0, -5), Y(0, 2) - -> Y'(2, 0) and T(4, 4) --> T'(4, 4).
What is geometric transformation?It is defined as the change in coordinates and the shape of the geometrical body. It is also referred to as a two-dimensional transformation. In the geometric transformation, changes in the geometry can be possible by rotation, translation, reflection, and glide translation.
It is given that:
The graph is shown in the picture.
From the picture the coordinates are:
I(-5,0), Y(0, 2), and T(4, 4)
The transformation rule:
(x, y) --> (y, x)
I(-5,0) --I'(0, -5)
Y(0, 2) - -> Y'(2, 0) and
T(4, 4) --> T'(4, 4)
Thus, the coordinates will be after applying the transformation, I(-5,0) --I'(0, -5), Y(0, 2) - -> Y'(2, 0) and T(4, 4) --> T'(4, 4).
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Three friends, Jessa, Tyree, and Ben, are collecting canned food for a culinary skills class. Their canned food collection goal is represented by the expression 9x2 − 3xy + 5. The friends have already collected the following number of cans:
Jessa: 5xy + 2
Tyree: 6x2 − 5
Ben: x2
Part A: Write an expression to represent the amount of canned food collected so far by the three friends. Show all your work. (5 points)
Part B: Write an expression that represents the number of cans the friends still need to collect to meet their goal. Show all your work. (5 points)
Answers
Answer:
Part A
7x² + 5xy – 3
Part B
2x² – 8xy + 8
Step-by-step explanation:
Part A
the canned food collected so far is the sum of the canned food the three friends have by combining the expression
5xy + 2 + 6x² – 5 + x²
= 6x² + x² + 5xy + 2 – 5
= 7x² + 5xy – 3
Part B
The total of cans the friend need to collect to meet their goal is the canned food collected so far minus their targeted goal
= 9x² – 3xy + 5 – (7x² + 5xy – 3)
= 9x² – 3xy + 5 – 7x² – 5xy + 3
= 9x² – 7x² – 3xy – 5xy + 5 + 3
= 2x² – 8xy + 8
i hope this helps
There is a dramatic change in desert temperatures from day to night because:
A: of the lack of nitrogen in the soil.
B: of the lack of water.
C: sand is such a poor insulator.
D: of the lack of vegetation
Answers
There is a dramatic change in desert temperatures from day to night because B. of the lack of water.
Why is there a change in temperature?It should be noted that because the air in the desert is so dry, heat escapes quickly at night, the temperature can vary dramatically from day to night. The temperature during the day averages 38°C, while at night it can drop to -4°C in some deserts. The temperature varies greatly depending on where you are in the desert.
During the day, the sand's radiation from the sun's energy superheats the air, causing temperatures to rise. And, because the desert air is so dry, heat escapes quickly at night, according to NASA. The desert biomes are the driest of all biomes.
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What is the correct prime factorization of 24? 2 ∙ 2 ∙ 6 2 ∙ 3 ∙ 3 2 ∙ 2 ∙ 3 ∙ 3 2 ∙ 2 ∙ 2 ∙ 3
Answers
Answer:
2x2x2x3
Step-by-step explanation:
$35.82 total. He gives the cashier $50. How much change should Rishank receive?
Answers
Answer: $14.18
Step-by-step explanation:
Because total change is the amount the cashier is giving back to us,
we can do
$ amount given - $ price of order = $ total change
So:
50 - 35.82 = $14.18
The cashier will give us $14.18 back in change.
The volume of a cylinder having height one and half of the radius is 12,936 m3 what minimum square cm of paper is needed to cover the curved surface area of the cylinder? The answer should be 1848m2. please solve my question.
Answers
Answer:
Lateral Surface Area = 1848 m^2 (does not include the top and bottom)
Step-by-step explanation:
Vol Cylinder = pi*r^2 *h
h = (3/2)r
Vol = pi*r^2((3/2)r) [We are told that the volume is 12,936 m^3]
pi*r^2((3/2)r) = 12,936 m^3
pi*(3/2)*(r^3) = 12,936 m^3
pi*r^3 = (12,936 m^3)*(2/3)
pi*r^3 = 8,624 m
r^3 = (8,624 m)/(3.14)
r^3 = 2745.1
r = 14.0 m
Lateral Surface = 2*(pi)*r*h [Lateral is just the curved portion of the right cylinder.
Lateral Surface Area = 2*(3.14)*(14.0)(21.0)
Lateral Surface Area = 1848 m^2
3. The coordinate (4, 3) is the solution to which system of equations?
Answers
The coordinate (4, 3) is the solution of the following system of equations:
y = 1/2x + 1 and y = -x + 7
y = x - 1 and y = 1/4x + 2
The solution implies that the coordinate is the: point of intersection.
What is the Solution to a System of Equations?The solution to a system of equations are the coordinate of the point where the two lines that represent the equations of the system intersect each other. The coordinate of x and the coordinate of y, when plugged into any of the equations would be true.
The graph of the system of equations, y = x - 1 and y = 1/4x + 2 shows that both equations intersect at the point with the coordinate (4, 3) [see the graph in figure 1].
Also, the graph in figure two shows that y = 1/2x + 1 and y = -x + 7 also intersect at (4, 3).
Therefore, we can state that, the system of equations with (4, 3) as the solution are:
y = 1/2x + 1 and y = -x + 7
y = x - 1 and y = 1/4x + 2
The solution means point of intersection.
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Solve 3+8X+6 = 5(X+2) + 3X-1
Answers
Answer: x= (−∞,∞)
Step-by-step explanation:
3+8x+6 = 5(x+2) + 3x-1
9+ 8x = 5x +10 + 3x -1
9 + 8x = 8x +9
Subtract nine on both sides
8x= 8x
x = Any number!
The number of students in attendance since 2000 at Lamar Community College can be represented by the equation below, where x equals the time in years after 2000. S(x) = (x - 50)² + 19 The college creates a graph to better view the decreases and increases in attendance. Which of the following describes the end behavior of their graph? O A. As x approaches positive infinity, S(x) remains constant. OB. As x approaches positive infinity, S(x) approaches positive infinity. OC. As x approaches positive infinity, S(x) approaches zero. OD. As x approaches positive infinity, S(x) approaches negative infinity.
Answers
As domain x approaches positive infinity, S(x) approaches positive infinity. Option B is correct.
What is a graph?The graph is a demonstration of curves that gives the relationship between the x and y-axis.
Given expression for the attendance of the student is,
S(x) = (x - 50)² + 19
The end behavior of their graph is given as after x = 50 the graph starts heigh increasing gradient and it keeps increasing, till x = infinity, as shown in the graph.
Thus, the curve of the given equation S(x) will increase from x = 50 to x = ∞ .
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A university will spend at most $4,500 to buy monitors and keyboards for a computer lab. Each monitor will cost $250, and each keyboard will cost $50.
Which inequality represents all possible combinations of x, the number of monitors, and y, the number of keyboards, the university can buy for the computer lab?
fifty x plus two hundred fifty y, symbol, four thousand five hundred
two hundred fifty X, plus fifty Y, symbol, four thousand five hundred
two hundred fifty X, plus fifty Y, symbol, four thousand five hundred.
fifty X plus two hundred fifty Y, symbol, four thousand five hundred
...
Answers
The inequality that represents all possible combinations of x, the number of monitors, and y, the number of keyboards, the university can buy for the computer lab is 250x + 50y <= 4500
Which inequality represents all possible combinations?
The given parameters are:
Spending = At most $4,500
Cost of monitor (x) = $250 per unit
Cost of keyboard (y) = $50 per unit
The total spending is represented as
Total = 250 * x + 50 * y
This gives
Total = 250x + 50y
The spending is at most $4,500 i.e less than or equal to
So, we have
250x + 50y <= 4500
Hence, the inequality that represents all possible combinations of x, the number of monitors, and y, the number of keyboards, the university can buy for the computer lab is 250x + 50y <= 4500
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the graph shoes the value a stock( to the nearest dollar) over an 8-hour period. FInd the average rate of change in the stock from hour 3 to hour 7. Round to the nearest cent if necessary.
Answers
The average rate of change in the stock from hour 1 to hour 6 is -$0.20/hr.
What is average rate of change in stock?
By subtracting the price of a security at time B from the price of the same security at time A and dividing the result by the price at time A, the price rate of change can be calculated. The indicator is a technical analysis tool that measures unbounded velocity versus a zero-level middle.We need to find the average rate of change of stock from 1 hour to 6 hours.
The value of stock was $11 in hour 1 and $10 in hour 6.
Average rate of change = Δy/ Δx
= $10 - $11 / 6-1
= - $1/5
= -$0.20 /hr
Hence, the average rate of change in the stock from hour 1 to hour 6 is -$0.20/hr.
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The number of beads in a jar is 50 to the nearest ten.
(a) What is the minimum possible number of beads in the jar?
(b) What is the maximum possible number of beads in the iar?
Answers
b) the maximum possible number of beads in the jar is 54
Answer:
a) 45
b) 54
Step-by-step explanation:
a) To be able to round up to the nearest 10, the number in the "ones column" needs to be 5 at the minimum.
You could argue it could be a decimal point however, you shouldn't really have a decimal of a bead ( it's possible but it over complicates the answer ) and, it's to the nearest 10, not nearest one decimal point for example.
Therefore, the min is 45 beads
b) ( The above poster was correct oops, I made a silly mistake )
The max is 54 beads as if anything in the ones column is under 4, you can't round up to the nearest 10. Hence it remains as 50 when rounding
Therefore, the max is 54 beads
which statement about the graph of y=3x+5 is correct?
Answers
The correct statement regarding the linear function y = 3x + 5 is given as follows:
The line passes through the ordered pair (0,5) and has a slope of 3.
What are the slope and the intercept of the linear function?The slope-intercept definition of a linear function is presented as follows:
y = mx + b.
The slope and the intercept are given as follows:
m is the slope, representing the rate of change of the linear function.The intercept is of b, representing the numeric value of the function when the input is of zero, hence the line passes through the ordered pair (0,b).In this problem, the function is defined as follows:
y = 3x + 5.
Hence the coefficients have the values given as follows:
m = 3, b = 5.
Missing InformationThe statements are given by the image shown at the end of the answer.
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how would your conclusion change if your sample mean had been 1.355 mg/l? what point does this make about statistical significance?
Answers
A small change in x can change the conclusion of our test.
Given :
how would your conclusion change if your sample mean had been 1.355 mg/l.
t - test :
A t-test is a statistical test that compares the means of two samples. It is used in hypothesis testing, with a null hypothesis that the difference in group means is zero and an alternate hypothesis that the difference in group means is different from zero.
if x = 1.355
t = 1.355 - 1.3 / 0.18 / [tex]\sqrt{30}[/tex]
= 0.055 / 0.18 / [tex]\sqrt{30}[/tex]
= 0.055 * [tex]\sqrt{30}[/tex] / 0.18
= 1.67
df = n - 1
= 30 - 1
= 29
P - value from t table :
p = 0.525
fail to reject [tex]H_0[/tex]
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Full question :
The Environmental Protection Agency has determined that safe drinking water should contain no more than 1.3 mg/liter of copper. You are testing water from a new source, and take 30 water samples. The mean copper content in your samples is 1.36 mg/l and the standard deviation is 0.18 mg/l. There do not appear to be any outliers in your data .
how would your conclusion change if your sample mean had been 1.355 mg/l? what point does this make about statistical significance?
The graph shows the results of a survey that asked people to choose their favorite
dinner foods. One of the persons surveyed is chosen at random.
What is the probability that she chose Potatoes?
Answers
Answer:
7.5%
Step-by-step explanation:
a probability is always
desired cases / totally possible cases
the totally possible cases is everybody in the survey :
24+18+14+10+8+6 = 80
the desired cases are everybody having potatoes a favorite food : 6
the probability the picked person prefers potatoes is
6/80 = 3/40 = 0.075 = 7.5%
In \triangle EFG,△EFG, \angle E \cong \angle G,∠E≅∠G, GE = 17GE=17 and FG = 10FG=10. Find the length of EF. EF
Answers
In the triangle EFG, ∠E≅∠G, GE = 17 units and FG = 10 units, then the length of the side EF is 10 units
The given triangle EFG
The length of the side GE = 17 units
The length of the side FG = 10 units
The measure of angle E is equal to the measure of angle G
The equation will be
∠E≅∠G
Therefore the triangle is Isosceles triangle
The length of the side FG will be equal to the length of the side FE
The length of the side EF = The length of the side FG = 10 units
Therefore, the length of the side EF is 10 units
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help me please!!! :)
Answers
Answer:
A
(will be continued)
Step-by-step explanation:
this is an exponential graph
The original mass is 7.71 because it is being multiplied by the percentage.
0.9333 in percentage form is 93.33
Since it is being multiplied, by the original mass this means that 93.33% of it is the amount being left over.
100% - 93.33% = 6.67%
this is the decrease in the amount of the thing
***tell me if i explained it clearly i'm not sure if i did
HELP PLEASE ?! HURRY
Answers
Only a line that goes from (0, 0) and (3.6, 14.4) satisfy the given relationship.
What is a expression? What is a mathematical equation? What is constant of proportionality?A mathematical expression is made up of terms (constants and variables) separated by mathematical operators.A mathematical equation is used to equate two expressions. Equation modelling is the process of writing a mathematical verbal expression in the form of a mathematical expression for correct analysis, observations and results of the given problem.For any function y = f(x), Domain is the set of all possible values of [y] that exists for different values of [x]. Range is the set of all values of [x] for which [y] exists.The general equation of a straight line is y = mx + c. The equation can also be used to represent direct proportionality as -
y = mx
m = y/x
[m] is called constant of proportionality.
Given is a graph as shown in the figure.
The graph represents a proportional relationship. The possible coordinates that can be plotted are (x, y) and not (y, x). Only a line that goes from (0, 0) and (3.6, 14.4) satisfy the given relationship.
Therefore, only a line that goes from (0, 0) and (3.6, 14.4) satisfy the given relationship.
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what is (-4x² + 3x + 3)(x² - 2x + 2) as a polynomial
Answers
The given expression is in the form of the polynomial as -4x⁴+11x³-5x²+6 and the degree of the polynomial is 4.
What is a polynomial?Polynomial is the combination of variables and constants systematically with "n" number of power in ascending or descending order.
[tex]\rm a_1x+a_2x^2+a_3x^3+a_4x^4..........a_nx^n[/tex]
It is given that the polynomial expression is, (-4x² + 3x + 3)(x² - 2x + 2)
We have to simplify the expression by multiplying the expression as,
=-4x²(x² - 2x + 2)+3x(x² - 2x + 2)+3(x² - 2x + 2)
=-4x⁴+8x³-8x²+3x³-6x²+6x+3x²-6x+6
= -4x⁴+11x³-5x²+6
Thus, the given expression is in the form of the polynomial as -4x⁴+11x³-5x²+6 and the degree of the polynomial is 4.
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What will the dividend income be on W number of shares of XYZ stock if XYZ distributes a $Y per share dividend?
Answers
Answer:
In general, the dividend income on W number of shares of XYZ stock will be W * Y dollars if XYZ distributes a $Y per share dividend.
Step-by-step explanation:
The dividend income on W number of shares of XYZ stock will be W * Y dollars if XYZ distributes a $Y per share dividend. This is because the dividend income is calculated by multiplying the number of shares that an investor owns by the amount of the dividend per share.
For example, if an investor owns W = 100 shares of XYZ stock and XYZ distributes a $Y = 5 per share dividend, then the investor's dividend income will be 100 * 5 = 500 dollars.
In general, the dividend income on W number of shares of XYZ stock will be W * Y dollars if XYZ distributes a $Y per share dividend.
justin purchased a lawn sprinkler costing 9.23. If Justin recived 9.07 in change, how much money did he give the cashier
Answers
Answer: $18.30
Step-by-step explanation:
The sprinkler cost 9.23, and the change is 9.07, so adding both of them equal $18.30
Answer 18.3
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Jane had 5 1/6 pecan pies. Marge had 4 3/6 pecan pies. How much pie do they had all together?
Answers
Answer:
9 4/6
Step-by-step explanation:
5 + 4 = 9
1/6 + 3/6 = 4/6
9 4/6
Hope this helps! :)
A frying pan has a diameter of 13 inches. What is the area to the nearest whole square inch of the smallest cover that will fit on top of the frying pan
Answers
Answer:
176cm
Step-by-step explanation:
area of a circle(cover)= pie r squaretherefore r=13÷2 =r=7.5. and pieces =22÷7
then we substitute
22÷7×(7.5 ×7.5)
=3.14×56.25
=176.58
to the nearest whole =176cm