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2 years ago

Expand and simpifly 2(x+7) + 3(x+1)

Mathematics

2 answers:

MaRussiya [10]2 years ago

6 0

Answer: 5x+17

Step-by-step explanation:

2(x+7) + 3(x+1)

2x+14 + 3x+3

5x+17

Bingel [31]2 years ago

4 0

Answer:

5x+17

Step-by-step explanation:

expanded:

2x+14 + 3x+3

simplified:

-collect like terms-

2x+3x=5x

14+3=17

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How many weeks of data must be randomly sampled to estimate the mean weekly sales of a new line of athletic footwear? We want 98

Irina18 [472]

Answer:

$n=(\frac{2.33(1400)}{400})^2 =66.50 \approx 67$

So the answer for this case would be n=67 rounded up

Step-by-step explanation:

Information given

$\bar X$ represent the sample mean for the sample

$\mu$ population mean

$\sigma=1400$ represent the sample standard deviation

n represent the sample size

Solution to the problem

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 =400 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 98% of confidence interval now can be founded using the normal distribution. And the critical value would be $z_{\alpha/2}=2.33$ , replacing into formula (b) we got:

$n=(\frac{2.33(1400)}{400})^2 =66.50 \approx 67$

So the answer for this case would be n=67 rounded up

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3 years ago

To build a road, a company charges a flat fee plus a fee that varies depending on the number of kilometers of road built. The co

Goshia [24]

I dont remember that one sorry

Step-by-step explanation:

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3 years ago

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Ivenika [448]

Answer:

Step-by-step explanation:

By using the process of elimination you can immediately disclose C and D as being incorrect.

35+85=120

180-85= 95

95=35+x

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I think that is the right answer, but I am may be wrong. I hope it helps! : )

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d=32

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2 years ago

if tyrone works 40 hours per week and has no other sources of income what is his total monthly cash inflow

Lerok [7]

$18 \times 40 = 720$

$720 \times 4 = 2880$

$2880 - 1800 = 1080$

~~

Answer : B

~~

I hope that helps you out!!

Any more questions, please feel free to ask me and I will gladly help you out!!

~Zoey

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3 years ago