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Lera25 [3.4K]
3 years ago
6

If a circle has a diameter of 7 inches, what is its circumference in terms of

Mathematics
2 answers:
aleksklad [387]3 years ago
6 0

Answer: 14π in

Step-by-step explanation:

Formula for circumference:

2πr

Plug in your values:

(2)(7)π = 14π in

11111nata11111 [884]3 years ago
5 0
Correct Answer: 7π
Explanation: Formular for circumference is 2πr. Since the diameter of the circle is 7 inches and you need the radius, you have to divide the 7 by 2. Once you have the radius, plug it in to the formula.

r = 7/2 = 3.5

(2)(3.5)π
= 7π
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Answer:

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Step-by-step explanation:

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icang [17]
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3 years ago
Solve for zzz. 42=-7(z-3)42=−7(z−3)
xxTIMURxx [149]

Answer:

False

Step-by-step explanation:

Well to solve for z we single it out, distribute, use the communicative property, and combine like terms.

42 = -7(z - 3)42 = -7(z - 3)

Distribute

42 = -7z + 21*42 = -7z + 21

42 = -7z + 882 = -7z + 21

-42 to both sides

-7z + 840 = -7z + 21

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-7z + 819 = -7z

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819 = 0

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<em>the given equation is false.</em>

<em>I hope this helps :)</em>

5 0
3 years ago
Step 1 of 3: Each year a nationally recognized publication conducts its Survey of America’s Best Graduate and Professional Schoo
lukranit [14]

Answer:

Step-by-step explanation:

Hello!

Given the variables

Y: Starting salary of a graduate at a top business school

X: GMAT score of the business school

The sample used had a size n=20

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The correlation coefficients were r= 0.81

You need to know if r is statistically significant at a 0.05 level:

Assuming the hypotheses are:

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H₁: There is no linear correlation between the variables of interest

α: 0.05

This test is two-tailed.

The p-value for a r=0.81 and n=20 is 0.000015

Using the p-value approach, the decision rule is:

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If p-value > α, do not reject the null hypothesis

In this case, the p-value is less than α, the decision is to reject the null hypothesis.

At a 5% level, you can conclude that the coefficient of correlation is statistically significant.

4 0
3 years ago
A model ship uses the scale 1 inch : 10 feet. If the model is 9.5 inches long, the ship is ____ feet long
Debora [2.8K]

Answer:

i got 95 inches

Step-by-step explanation:

5 0
2 years ago
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