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3 years ago

Evaluate expressions 9+11g-4h g=2 h=7

1 answer:

6 0

The given expression is :
9 + 11g - 4h.

substitute h=7 and g = 2 in given expression,

9 + 11(2) - 4(7) = 3.

Hope this helps!

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Which invention allowed computers to be smaller?

swat32

Answer:

laptop/phone

As the computer advanced, transistors were invented. They were smaller and allowed the computers to become smaller than ever. Slowly, the size of the computers decreased as more and more pieces were invented.

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

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

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4 years ago

A theater production group is making frames to support wall-like props. Three-foot beams form right triangles with 10-foot beams

AysviL [449]

The main lesson students and teachers should take away from this problem is the correct answer should be: who cares? The group built their frames with a ruler and a saw, got an exact slope of 10/3 and the angle measures didn't matter one bit. The best angles measures are the ones avoided.

But trig as taught is all about angles. Gotta find the angle. Here we have a right triangle and we're interested in the angle at the top of the frame, opposite side 3, adjacent side 10, so

$\tan \theta = \dfrac{3}{10}$

$\theta = \arctan \dfrac{3}{10} \approx 16.7^\circ$

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3 years ago

Read 2 more answers

PLEASE HELP

cricket20 [7]

You can use the cosine rule for this - you might have to change some of the letters around for it to make sense though. Hope this helps!

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3 years ago

6th grade math please help thx!!

Gnom [1K]

The answer is 26 so that means the quotient is 26.

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3 years ago