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Sonbull [250]
3 years ago
15

The table shows ticket prices at the movie 16 theater.Let a represent the number of adult tickets, c the number of childrens tic

kets and s the number of
senior citizen tickets.

adults cost:$8.75
childrens cost:$6.50
senior citizen cost:$6.50


A. write an expression for the total cost of the three types of tickets.
Mathematics
1 answer:
enyata [817]3 years ago
5 0
<span>A. write an expression for the total cost of the three types of tickets. </span>  
<span>adults cost:$8.75 
childrens cost:$6.50 
senior citizen cost:$6.50 </span>  
so from the given data, the expression for the total cost at the movie 16 theater <span>total cost = 8.75a + 6.50a + 6.50s</span>
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Answer:

The sample size needed is 2401.

Step-by-step explanation:

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In which

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The margin of error of the interval is:

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

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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.

Estimate the sample size needed if no estimate of p is available so that the confidence interval will have a margin of error of 0.02.

We have to find n, for which M = 0.02.

There is no estimate of p available, so we use \pi = 0.5

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

0.02 = 1.96\sqrt{\frac{0.5*0.5}{n}}

0.02\sqrt{n} = 1.96*0.5

\sqrt{n} = \frac{1.96*0.5}{0.02}

(\sqrt{n})^{2} = (\frac{1.96*0.5}{0.02})^{2}

n = 2401

The sample size needed is 2401.

7 0
3 years ago
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Answer:

(d + 3) would be 10

Step-by-step explanation:

<u>Step 1:  Distribute</u>

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4.5d + 13.5 = 45

<u>Step 2:  Subtract 13.5 from both sides</u>

4.5d + 13.5 - 13.5 = 45 - 13.5

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<u>Step 3:  Divide both sides by 4.5</u>

\frac{4.5d}{4.5} = \frac{31.5}{4.5}

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<u>Step 4:  Determine what (d+3) is</u>

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Answer: (d + 3) would be 10

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