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2 years ago

14

What is the value of the expression above when x = 3 and y = 4? You must show all work and calculations to receive full credit.

(4 points)

1 answer:

zmey [24]2 years ago

4 0

What's up?

let's implement these numbers into the problem first.

3•3 + 1/4 4^2

let's solve what we can

9 + 1/4 • 16

9 + 4 = 13

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Shen has bought tickets for a raffle. The odds in favor of his winning are 1:5. What is the probability of his winning?

gladu [14]

Answer:

Winning = (0.1667) or 16.6667%

Losing = (0.8333) or 83.3333%

Step-by-step explanation:

"Odds for" winning: 1:5

"Odds against" winning: 5:1

6 0

2 years ago

Convert to the given unit.

kondor19780726 [428]

Using the relation 1 in = 0.0277778 yd:

324 in * (0.0277778 yd) = 9 yd.

Among the choices, the correct answer would be A. 9 yd.

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3 years ago

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Snezhnost [94]

Insightful learning

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3 years ago

Read 2 more answers

You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proporti

Ksenya-84 [330]

Answer:

We need a sample size of at least 369.

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

The margin of error is:

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

For this problem, we have that:

$\pi = 0.32$

90% confidence level

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

How large of a sample size is required?

We need a sample size of at least n.

n is found when $M = 0.04$ . So

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

$0.04 = 1.645\sqrt{\frac{0.32*0.68}{n}}$

$0.04\sqrt{n} = 1.645\sqrt{0.32*0.68}$

$\sqrt{n} = \frac{1.645\sqrt{0.32*0.68}}{0.04}$

$(\sqrt{n})^{2} = (\frac{1.645\sqrt{0.32*0.68}}{0.04})^{2}$

$n = 368.02$

Rounding up

We need a sample size of at least 369.

5 0

3 years ago

7) Line Segment PR is 5 ft. Find the length of Line Segment PQ and QR. (Hint: use the segment addition postulate.)

Ghella [55]

Answer:

PQ = 1 ft

QR = 4 ft

Step-by-step explanation:

From the picture attached,

Segment PR has been divided into two parts by a point Q.

Length of segment PR = 5 feet

Length of segment PQ = (15x - 2) ft

Length of segment QR = (5x + 3) ft

Since, PR = PQ + QR

5 = (15x - 2) + (5x + 3)

5 = 20x + 1

20x = 4

x = $\frac{4}{20}$

x = 0.2

PQ = 15x - 2

= 15(0.2) - 2

= 3 - 2

= 1 ft

QR = 5x + 3

= 5(0.2) + 3

= 1 + 3

= 4 ft

4 0

3 years ago