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3 years ago

Plz plz help im not good at math..................................at all

Mathematics

1 answer:

asambeis [7]3 years ago

6 0

Answer:

8: subtract 1.50 from 11.50 until you get to 7.00 and count how many times you subtracted it that is your answer

9: take 254 and subtract 4 until you get to 228 count how many times you subtracted and that is your answer

10: take ten and add 6 until you get to 46 count how many times you added and that is your answer

Step-by-step explanation:

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Which shows the following expression after the negative exponents have been eliminated?

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4 years ago

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Solve for x. 6x – 4(3x – 5) = 2 A. x =113 B. x = 3 C. x = –3 D. x = –113

dezoksy [38]

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3 years ago

C. what percent of the days were sunny or rainy?

Oxana [17]

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3 years ago

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What is the value of the expression? 84-24428 13 115 13.4 152 O

timama [110]

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Step-by-step explanation:

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3 years ago

The standard deviation of a sample taken from population A is 17.6 for a sample of 25.

lawyer [7]

Answer:

The standard deviation of the sample mean differences is _5.23_

Step-by-step explanation:

We have a sample of a population A and a sample of a population B.

For the sample of population A, the standard deviation $\sigma_A$ is

$\sigma_A = 17.6$

The sample size $n_A$ is:

$n_A = 25$ .

For the sample of population B, the standard deviation $\sigma_B$ is

$\sigma_B = 21.2$

The sample size $n_B$ is:

$n_B = 30$ .

Then the standard deviation for the difference of means has the following form:

$\sigma=\sqrt{\frac{\sigma_A^2}{n_A}+\frac{\sigma_B^2}{n_B}}$

Finally

$\sigma=\sqrt{\frac{17.6^2}{25}+\frac{21.2^2}{30}}\\\\\sigma= 5.23$

7 0

4 years ago