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3 years ago

9

Bader gave away 24 of his toy cars. Which integer shows the change in the number of toy cars he has?

1 answer:

Zielflug [23.3K]3 years ago

7 0

Answer:

The integer that shows the change in the number of toy cars Bader has is <u>-24.</u>

Explanation:

Think of it like a math problem, when you take away from your own amount, (in this case, his cars) you're subtracting from the original amount of things you had. The symbol for subtraction is also "-", so with that information it's a bit self explanatory to know which answer is correct.

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3 years ago

Can anybody show me the steps to answering this question? 7x - 2z = 4 - xy<br> (solve for x)

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Step-by-step explanation:

We are trying to solve for x

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Add xy to both sides:

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3 years ago

What is the standard error of a sampling distribution with a population standard deviation of 12 and the sample size of 81?

Marizza181 [45]

Answer: d. 1.3333

Step-by-step explanation:

We know that the standard error of a sampling distribution is given by :-

$S.E.=\dfrac{\sigma}{\sqrt{n}}$

, where $\sigma$ = Population standard deviation.

n= Sample size.

AS per given , we have

$\sigma =12$

n=81

Then, the standard error of a sampling distribution with a population standard deviation of 12 and the sample size of 81 will be :-

$S.E.=\dfrac{12}{\sqrt{81}}$

$=\dfrac{12}{\sqrt{9^2}}=\dfrac{12}{9}\\\\=\dfrac{4}{3}\\\\\approx1.3333$

Hence, the standard error of a sampling distribution with a population standard deviation of 12 and the sample size of 81 is 1.3333.

Thus the correct answer is d. 1.3333 .

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3 years ago