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3 years ago

10 points?...1) must be quick to answer,2) must be reasonable answer,3) Show explanation for your answer

Mathematics

1 answer:

Ilia_Sergeevich [38]3 years ago

3 0

Your answer is
${x}^{2} \div {2} {z}^{9}$
because the numbers raised to negative powers must be flipped over the divisor to become positive. Then, when multiplying 2 and z, you add their exponents.

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SVEN [57.7K]

Answer:

540 degrees in a pentagon

4 + 8 + 6 + 4 + 5 = 27

540/27 = 20

4 X 20 = 80 degrees

8 X 20 = 160 degrees

6 X 20 = 120 degrees

4 X 20 = 80 degrees

5 X 20 = 100 degrees

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3 years ago

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3 years ago

40/396 simplified can you help

Elena-2011 [213]

Answer:

10/99

Step-by-step explanation:

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3 years ago

Working together to palms can drain a certain pool in three hours if it takes the older pump nine hours to drain the pool by its

andreyandreev [35.5K]

Answer:

It would take the newer pump 4.5 hours to drain the pool

Step-by-step explanation:

Let's investigate first what is the fraction of the job done in the unit of time (hour in this case) by each pump if the work individually:

older pump: if it takes it 9 hours to complete the job, it does $\frac{1}{9}$ of the job in one hour.

newer pump: we don't know how long it takes (this is our unknown) so we call it "x hours". Therefore, in the unit of time (in one hour) it would have completed $\frac{1}{x}$ of the total job.

both pumps together: since it takes both 3 hours to complete the job, in one hour they do $\frac{1}{3}$ of the job.

Now, we can write the following equation about fractions of the job done:

<em>The fraction of the job done by the older pump plus the fraction of the job done by the newer pump in one hour should total the fraction of the job done when they work together.</em> That is in mathematical terms:

$\frac{1}{9} +\frac{1}{x} =\frac{1}{3}$

and solving for x:

$\frac{1}{9} +\frac{1}{x} =\frac{1}{3} \\x+9=3x\\2x=9\\x=\frac{9}{2} \,\,hours\\x = 4.5\,\,hours$

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3 years ago

(pls help!!) Find an equation in point-slope form for the line having the slope m=2 and containing the point (4,5).

ANTONII [103]

Y-5=2(x-4)

That’s point slope form

6 0

3 years ago