3 years ago

7 - ( -9 + 2i ) - ( 17 - i )

Mathematics

1 answer:

Mumz [18]3 years ago

3 0

-1 - I

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A. -5<br> B. 11<br> C. 38 - 8i<br> D. 3+ 8i

siniylev [52]

Answer:

Step-by-step explanation:

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What is the best for the total weight of these cold meats 1 7/8 of bologna 1 1/2 pounds of ham and 7/8 of roast beef ?

In-s [12.5K]

We need to have common denominators, so I will multiply 1 1/2 by 4
15/8 + 12/8 + 7/8 = 34/8
4&1/4 pounds of meat

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3 years ago

2,236.8 to the nearest ten

german

Answer:

Already rounded to the nearest tenth.

2236.8

Step-by-step explanation: k

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A lumber company is making boards that are 2920.0 millimeters tall. If the boards are too long they must be trimmed, and if the

Effectus [21]

Answer:

The value of the test statistic is of 0.22.

Step-by-step explanation:

Our test statistic is:

$t = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

In which X is the sample mean, $\mu$ is the expected mean, $\sigma$ is the standard deviation(square root of the variance) and n is the size of the sample.

A lumber company is making boards that are 2920.0 millimeters tall.

This means that $\mu = 2920$ .

A sample of 12 is made, and it is found that they have a mean of 2922.7 millimeters with a variance of 121.00.

This means that $X = 2922.7, n = 12, \sigma = \sqrt{121} = 11$ . So

$t = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

$t = \frac{2922.7 - 2922}{\frac{11}{\sqrt{12}}}$

$t = 0.22$

The value of the test statistic is of 0.22.

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3 years ago

ANSWER QUICKLY!!! What is the median of Restaurant B's cleanliness ratings?

notsponge [240]

2 is the answer Hope it helped

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