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3 years ago

10

Which of the following is a solution of x2 − 2x = −8? (6 points)

1 answer:

astraxan [27]3 years ago

6 0

Answer------>1+ i square root of 7

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A ladder is 74 inches tall. How tall is it in feet and inches?

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Step-by-step explanation:

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Factor completely 3x − 12.<br><br> 3(x − 4)<br><br> 3(x + 4)<br><br> 3x(−12)<br><br> Prime

garri49 [273]

3x - 12
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Alexxandr [17]

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3 years ago

In a sample of 42 water specimens taken from a construction site, 26 contained detectable levels of lead. Construct 90% confiden

hram777 [196]

Answer:

(0.4958, 0.7422)

Step-by-step explanation:

Let p be the true proportion of water specimens that contain detectable levels of lead. The point estimate for p is $\hat{p}=26/42=0.6190$ . The estimated standard deviation is given by $\sqrt{\hat{p}(1-\hat{p})/n}=\sqrt{(0.6190)(1-0.6190)/42}=0.0749$ . Because we have a large sample, the 90% confidence interval for p is given by $0.6190\pm z_{0.05}0.0749$ where $z_{0.05}=1.6448$ is the value that satisfies that above this and under the standard normal density there is an area of 0.05. So, the confidence interval is $0.6190\pm (1.6448)(0.0749)$ , i.e., (0.4958, 0.7422).

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3 years ago

The dry cleaning fee for 3 pairs of pants is $18.

Ivanshal [37]

Answer:

a. 1 pair of pants is $6

b. $66 for 11 pairs of pants

a. 18/3 = 6

b. 6 × 11 = 66

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3 years ago