2 years ago

1) - (-2 - 5x)

1 answer:

7 0

Assuming that we are solving for x when each equation is equal to zero, the solutions are:

1) -.4
2) 1/3
3) 2
4) 7/3
5) -4

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Estimate

Taya2010 [7]

126/10 would mean that from the original number, the decimal point is at 126.0 so when it is divided by 10, it will move over one placement, making it 12.6... I would estimate that your answer is C. 12.6

5 0

3 years ago

Given n = 2500 and p ^ = 0.86, find the margin of error E that corresponds to a 99% confidence level.

ser-zykov [4K]

Sample size = n = 2500
Sample Proportion = p = 0.86
Confidence Level = 99%
Z-value for the confidence level = z = 2.576 (This Value comes from the z-table)

The formula for Margin of Error is:

$E=z* \sqrt{ \frac{p(1-p)}{n} }$

Using the given values, we get:

$E=2.576* \sqrt{ \frac{0.86(0.14)}{2500} } \\ \\ 
E=0.0179$

Thus, the margin of error would be 0.0179 or 1.79%

7 0

3 years ago

The mean of the distribution of the mean is equal to mean of parent population?

lesantik [10]

They are equal to what ever number that you use

3 0

3 years ago

A road crew must repave a road that is 4/5 miles long. They can repave 1/20 miles each hour. How long will it take the crew to r

vichka [17]

Let's set these equations up first before anything.
4/5 mi and 1/20 mi per hour.
Multiply 4/5 by a number that will get your denominator (5) to 20.
5 x 4 is 20, so multiply 4/5 by 4.
16/20 miles, or, 16 hours, since 1/20 mi is made per hour.
Your answer is 16 hours.
Hope this helps :)

5 0

3 years ago

Team Rise Over Run canoed 15 3/4 miles in 2 1/4 hours. What was their average rate of speed in miles per hour?

SCORPION-xisa [38]

(15 3/4) / (2 1/4) =
(63/4) / (9/4) =
63/4 * 4/9 =
63/9 =
7 miles per hr <===

7 0

3 years ago

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