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3 years ago

Which statement is true about the scatter plot? Select all that apply.

Mathematics

1 answer:

Marta_Voda [28]3 years ago

3 0

Answer:

Please show what to select.

Step-by-step explanation:

You can edit your question. Thank you

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Which statement about this equation is true?

Viktor [21]

The equation has no solution because:

5(n+10)=5n+10n
5n+10n=5n+10n
I subtract 5n from both sides
10n=10n
Only one side is supposed to have the variable which is n, so the equation has no solution.

4 0

3 years ago

Adult entrance fees to amusement parks in the United States are normally distributed with a population standard deviation of 2.5

kondor19780726 [428]

Answer: 1.509

Step-by-step explanation:

The formula of Margin of Error for (n<30):-

$E=t_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}$

Given : Sample size : n= 22

Level of confidence = 0.99

Significance level : $\alpha=1-0.99=0.01$

Using the t-distribution table ,

Critical value : $t_{n-1, \alpha/2}=t_{21,0.005}= 2.831$

Standard deviation: $\sigma=\text{ 2.5 dollars }$

Then, we have

$E=( 2.831)\dfrac{2.5}{\sqrt{22}}\approx1.509$

Hence, the margin of error for a 99% confidence interval for the population mean =1.509

4 0

3 years ago

A kite is flying at an angle of elevation of 48º. Find the height of the kite if 39 ft of the string have been let out.

Naddika [18.5K]

A kite is flying at an angle of elevation of 48 degrees

5 0

2 years ago

What does x equal to? “?” = x Solve by using fractions and round to the nearest hundredth if necessary

Anna007 [38]

Answer:

3.5 inches

Step-by-step explanation:

We can rotate the figure to the left 90 degrees clockwise so that it becomes same orientation as the figure to the right.

Since they are similar figures, their corresponding sides are proportional.

The 4 inch side of left figure corresponds to 16 in side of right side figure.

The "?" inch side of left figure corresponds to 14 in side of right side figure.

We can replace "?" with "x" and setup two ratios and equate them:

$\frac{4}{16}=\frac{x}{14}$

Now, we can cross multiply and solve for x:

$\frac{4}{16}=\frac{x}{14}\\16x=4*14\\16x=56\\x=\frac{56}{16}\\x=3.5$

Hence,

the unknown side marked "?" is equal to 3.5 inches

6 0

3 years ago

at a maximum speed, an airolane travels 1680 miles against the windin 5 hours. Flying with the wind, the plane can travel the sa

Licemer1 [7]

Answer:

Plane Speed (x) = 378 mph

Step-by-step explanation:

Equation

d = r * t

Givens

With the wind

d = 1680 miles
t = 4 hours
r = x + y

Against the wind

d = 1680
t = 5 hours
r = x - y

Equation

The distances are the same, so you can solve for x in terms of y and then deal with the actual distance.

(x + y)*4 = (x - y)*5 Remove the brackets on both sides

Solution

4x + 4y = 5x - 5y Subtract 4x from both sides
4y = -4x + 5x - 5y Combine
4y = x - 5y Add 5y to both sides
5y + 4y = x
x = 9y

Solution part 2

Now take one of the distance formulas and solve for x first then y.

(x - y)*5 = 1680 Substitute 9y for x
(9y - y)*5 = 1680 Subtract on the left
8y * 5 = 1680 Multiply on the left
40y = 1680 Divide by 40
y = 1680/40
y = 42 That's the speed of the wind.

(x - y)*5 = 1680 Substitute the wind speed for y
(x - 42)*5 = 1680 Divide both sides by 5
(x - 42) = 1680 / 5 Do the division on the right
(x - 42) = 336 Add 42 to both sides.
x = 336 + 42
x = 378 mph Plane's speed

7 0

3 years ago