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2 years ago

Please help me this is due! 7th grade math offering 20 points and might give brainly if I get more than one answer :)

Mathematics

2 answers:

kykrilka [37]2 years ago

8 0

Answer:

$98.90

Step-by-step explanation:

Let x = original price in dollars

x is the original price

9% of this original price is equal to 0.09x

subtract: x - 0.09x = 0.91x

The discount price is equal to 0.91x and it's equal to 90 dollars, so they must be the same value.

0.91x = 90

0.91x/0.91 = 90/0.91

x = 98.9010989

x = 98.90

So the original price is $98.90

Bezzdna [24]2 years ago

3 0

Answer:

I'm pretty sure it's $98.10

Step-by-step explanation:

$90*.09=8.1

90+8.1=98.1

which can also be written as $98.10

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Answer:

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$\displaystyle\frac{37\pi}{10}$

Step-by-step explanation:

See the sketch of the region in the attached graph.

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$\displaystyle\int_1^4\pi(x-\sqrt{x})^2dx$

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$\displaystyle\pi\int_1^4x^2-2x^{3/2}+x\,dx$

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Simplifying a bit:

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Then plugging the limits of the integral:

$\displaystyle\pi\left[\frac{4^3}{3}-\frac{4(4)^{5/2}}{5}+\frac{4^2}{2}-\left(\frac{1}{3}-\frac{4}{5}+\frac{1}{2}\right)\right]$

Taking the root (rational exponents):

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3 years ago

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Answer:

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Step-by-step explanation:

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2 years ago

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Answer:

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Step-by-step explanation:

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