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3 years ago

The Healy family drove 192 miles in 4.5 hours. How many miles could they drive at this rate in 3 hours

1 answer:

4 0

Let’s find this out by using proportions! it is very easy to do

192 miles/4.5 hours = m/3 hours

192 * 3 = 4.5 * m cross multiply

576 = 4.5m

576 / 4.5 = m divide both sides by 4.5

128 = m

your answer is 128 miles! hope this helped, blessings! x

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Equivalent decimal are decimal that have the same value. True Or False

tekilochka [14]

True because decimals do have the same number when they are equivalent

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3 years ago

Item Value

7nadin3 [17]

Answer:

TRUE

Step-by-step explanation:

HOPE THIS HELPED!!

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2 years ago

A population has a standard deviation of 5.5. What is the standard error of the sampling distribution if the sample size is 81?

VladimirAG [237]

Answer:

$\sigma = 5.5$

And we have a sample size of n =81. We want to estimate the standard error of the sampling distribution $\bar X$ and for this case we know that the distribution is given by:

$\bar X \sim N(\mu ,\frac{\sigma}{\sqrt{n}})$

And the standard error would be:

$\sigma_{\bar x}= \frac{\sigma}{\sqrt{n}}$

And replacing we got:

$\sigma_{\bar x}=\frac{5.5}{\sqrt{81}}= 0.611$

Step-by-step explanation:

For this case we know the population deviation given by:

$\sigma = 5.5$

And we have a sample size of n =81. We want to estimate the standard error of the sampling distribution $\bar X$ and for this case we know that the distribution is given by:

$\bar X \sim N(\mu ,\frac{\sigma}{\sqrt{n}})$

And the standard error would be:

$\sigma_{\bar x}= \frac{\sigma}{\sqrt{n}}$

And replacing we got:

$\sigma_{\bar x}=\frac{5.5}{\sqrt{81}}= 0.611$

4 0

3 years ago

What is the value of x? 4. = 50-12 Enter your answer in the box. x =

Dimas [21]

The question doesn’t make much sense. Do you mean x=50-12? If so, x=38

3 0

3 years ago

Given the following system of equations: 2x + 6y = 12 4x + 3y = 15 Which action creates an equivalent system that will eliminate

ozzi

Answer:

Multiply the second equation by −2 to get −8x − 6y = −30.

Step-by-step explanation:

{2x + 6y = 12

{4x + 3y = 15

{2x + 6y = 12

{−8x − 6y = −30 >> New Equation

* Doing this will give you additive inverses of −6y and 6y, which result in 0, so they are both ELIMINATED.

** [3, 1] is your solution.

I am joyous to assist you anytime.

6 0

3 years ago

Read 2 more answers