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3 years ago

1. How many terms does the expression 5 + 9x · 7 + 2xº have? What are they?

Mathematics

1 answer:

mel-nik [20]3 years ago

6 0

This expression has four terms.

5, 9x, 7, and 2x

A term is a constant number, a variable, or a variable with a coefficient.

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Is y=4x-1 proprtional

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In how many ways can 2 singers be selected from 4 who came to an audition?

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4 years ago

Read 2 more answers

A study of recent records of car accidents revealed that average proportion of drivers who were distracted by their phones at th

aksik [14]

Answer:

At least 547 records need to be studied.

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 interval $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

Z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

And the margin of error is:

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

95% confidence interval

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

In this problem, we have that:

$M = 0.04, p = 0.35$

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

$0.04 = 1.96\sqrt{\frac{0.35*0.65}{n}}$

$0.04\sqrt{n} = 0.93486$

$\sqrt{n} = 23.37$

$n = 546.2275$

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4 years ago

What is the slope of the following table?

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Answer:

slope: 5/2

Step-by-step explanation:

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3 years ago

Can someone pls help im new to this

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Answer:

Step-by-step explanation:

$\frac{-10}{-2} \\\\5$

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3 years ago