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3 years ago

Chose one value for x and substitute the value in the equation to get your answer pick x=15 or x=12 or x=10 2x+13

Mathematics

2 answers:

lora16 [44]3 years ago

8 0

If I pick 10, then 2(10)+13=33
If I pick 15, then 2(15)+13=43
If I pick 12, then 2(12)+13=37

11111nata11111 [884]3 years ago

7 0

Step-by-step explanation:

If I pick x = 15 , 2x+13=2(15)+13=30+13=43

If I pick x =12 , 2x+13=2(12)+13=24+13=37

If I pick x =10. , 2x+13=2(10)+13=20+13=33

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devlian [24]

Answer:

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Step-by-step explanation:

Half a number is $2.25, so multiply 2.25 times each half.

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3 years ago

Suppose that a market research firm is hired to estimate the percent of adults living in a large city who have cell phones. 500

Alborosie

Answer:

The 95% confidence interval estimate for the true proportion of adults residents of this city who have cell phones is (0.81, 0.874).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

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In which

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For this problem, we have that:

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So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

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The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.842 + 1.96\sqrt{\frac{0.842*0.158}{500}} = 0.874$

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3 years ago

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topjm [15]

Answer:

Step-by-step explanation:

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babymother [125]

I think it's 8%. Hope this helps!

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Lyrx [107]

Answer:

Let x rep the lenght of the shorter one

Then the longer one is 2x+1

Therefore

(2x+1) + x = 16

We now solve for x

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Group and evaluate like terms

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3x = 16 -1

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x = 5

So the shorter one is 5 ft

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3 years ago