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3 years ago

Choose which function is represented by the graph. f(x)=(x-2)(x+1)(x+3)(x+6)

Mathematics

1 answer:

Lapatulllka [165]3 years ago

6 0

Answer:

0,-36 I think

Step-by-step explanation:

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Since spring started, Kareem has been surveying the growth of leaves on his neighborhood trees. He goes out every day and comput

Lynna [10]

Answer:

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Step-by-step explanation:

did it on edge

7 0

2 years ago

The brand manager for a brand of toothpaste must plan a campaign designed to increase brand recognition. He wants to first deter

VMariaS [17]

Answer:

He must survey 123 adults.

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.

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

In which

z is the z-score that has a p-value of $1 - \frac{\alpha}{2}$ .

The margin of error is:

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

Assume that a recent survey suggests that about 87% of adults have heard of the brand.

This means that $\pi = 0.87$

90% confidence level

So $\alpha = 0.1$ , z is the value of Z that has a p-value of $1 - \frac{0.1}{2} = 0.95$ , so $Z = 1.645$ .

How many adults must he survey in order to be 90% confident that his estimate is within five percentage points of the true population percentage?

This is n for which M = 0.05. So

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

$0.05 = 1.645\sqrt{\frac{0.87*0.13}{n}}$

$0.05\sqrt{n} = 1.645\sqrt{0.87*0.13}$

$\sqrt{n} = \frac{1.645\sqrt{0.87*0.13}}{0.05}$

$(\sqrt{n})^2 = (\frac{1.645\sqrt{0.87*0.13}}{0.05})^2$

$n = 122.4$

Rounding up:

He must survey 123 adults.

6 0

3 years ago

alana and petra go to a used book sale, where every book is the same price. Alana buys 5 books and Petra buys 4 books. They run

Pachacha [2.7K]

After understanding the problem, formulate equations to determine the unknown. Let x be the price of one book. Equating Alana&Petra's expense with Angus' would be

5x + 4x +5 = 19x - 10

The 5 in the left side is needed because Angus' expense is $5 more. Also, the 10 on the right side represents the $10 discount. Solving the equation,

19x = 9x = 5+10
10x = 15
x = $1.5

Therefore, the book costs $1.5.

8 0

4 years ago

What number cube has faces numbered 1 to 6.

mars1129 [50]

Answer:

I don`t see the attachment

Step-by-step explanation:

5 0

3 years ago

Select all the equations that are true when x = 6.

tangare [24]

17 - x = 11
X➗2 = 3
5 + x = 11