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2 years ago

PLS HELP IF POSSIBLE ASAP

Mathematics

1 answer:

sladkih [1.3K]2 years ago

4 0

The value of y if x is equal to 5 is 75 and the value of y when x = 7 is 8/7

<h3>Direct and inverse variation</h3>

Variations shows the relationship between variables.

4) If y varies directly as x², hence;

y = kx²

27 = 9k
k = 3

In order to determine y if x = 5

y = 3(5*5)
Y = 75

Hence the value of y if x is equal to 5 is 75

5) If y varies inversely as x, hence;

y = k/x
k = xy
k = 16(1/2)

k = 8

If x = 7, the value of y will be;

y = 8/7

Hence the value of y when x = 7 is 8/7

Learn more on variation here: brainly.com/question/13998680

#SPJ1

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3 years ago

4 times the quantity of 20 decreased by a number

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Answer:

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3 years ago

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3 years ago

Read 2 more answers

What are the answers for 2, 3 , and 4? That’s it

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Answer:

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5 0

2 years ago

A survey shows that 10% of the population is victimized by property crime each year. A random sample of 527 older citizens (65 y

jekas [21]

Answer:

The data provide sufficient evidence that older people are more likely to be victimized.

Step-by-step explanation:

H 0 : P = 0.10

H 1 : P > 0.10 (Right tailed test)

n = 527, P = 0.1235

The test statistics

x = P - p / $\sqrt{p*(1-p) / n}$

x = 0.1235 - 0.10 / $\sqrt{0.10 * 0.90 / 527}$

x = 0.0235 / $\sqrt{0.09 / 527}$

x = 0.0235 / $\sqrt{0.00017077798}$

x = 0.0235 / 0.0130682049264618

x = 1.798257689731729

x = 1.798

P value = [1 - p(Z > 1.7980] (Right tailed test)

P value = 0.036089

The P - Value is very small, so <u>reject H0</u>

Conclusion: The data provide sufficient evidence that older people are more likely to be victimized.

7 0

3 years ago