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3 years ago

Subtract. (Models confuse me)

1 answer:

5 0

You should just know that the second part gonna be like : -13x+16 so now u can solve it : -2x+6-13x+16 = -15x + 22 so the answer is D. -15x+22 :)))
i hope this be helpful
* marry Christmas *

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The jogging track is of a mile long. If Ashley jogged around it 4 times, how far did she run?

matrenka [14]

Answer: 4 miles

Step-by-step explanation:

If Ashley ran 1 mile 4 times, she ran 1+1+1+1, or 1*4, or 4 miles.

<em>Hope it helps <3</em>

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3 years ago

Which is not a property of countercurrent multiplication?

laiz [17]

Answer:

It is opposed by the vasa recta.

Step-by-step explanation:

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2 years ago

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Lily wants to make a banquet of 2 dozen flowers. She picked 5 roses, 6 daisies, and 7 tulips. How many more flowers does Lily ne

lakkis [162]

The person would only need 6 roses

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3 years ago

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You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard devia

gtnhenbr [62]

Answer:

$n=(\frac{2.58(58.2)}{1})^2 =22546.82 \approx 22547$

So the answer for this case would be n=22547 rounded up to the nearest integer

Step-by-step explanation:

Let's define some notation

$\bar X$ represent the sample mean

$\mu$ population mean (variable of interest)

$\sigma=58.2$ represent the population standard deviation

n represent the sample size

$ME =1$ represent the margin of error desire

The margin of error is given by this formula:

$ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (a)

And on this case we have that ME =+1 and we are interested in order to find the value of n, if we solve n from equation (a) we got:

$n=(\frac{z_{\alpha/2} \sigma}{ME})^2$ (b)

The critical value for 99% of confidence interval now can be founded using the normal distribution. The significance would be $\alpha=0.01$ and the critical value $z_{\alpha/2}=2.58$ , replacing into formula (b) we got:

$n=(\frac{2.58(58.2)}{1})^2 =22546.82 \approx 22547$

So the answer for this case would be n=22547 rounded up to the nearest integer

3 0

3 years ago

Tao wants to check that the expression 3(4x – 6) simplifies to 12x – 18. What is the value when 2 is substituted for x into both

timurjin [86]

Answer:

Step-by-step explanation:

3( 4x - 6)

Let x =2

3( 4*2 -6)

3(8-6)

3*2

Check

12x-18

12*2 -18

24-18

Both equal 6

4 0

3 years ago