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3 years ago

Select the correct answer.

Mathematics

1 answer:

Black_prince [1.1K]3 years ago

6 0

Answer:

i think the answer is b if i am wrong please tell me please :(

Step-by-step explanation:

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Pls help me! 19 and 20.

Murljashka [212]

Answer:

See below ↓

Step-by-step explanation:

19.

$\frac{x-1}{2} - \frac{x-3}{5} - \frac{x-7}{10} + \frac{x-2}{5}$
$\frac{5(x-1)-2(x-3)-(x-7)+2(x-2)}{10}$
$\frac{5x-5-2x+6-x+7+2x-4}{10}$
$\frac{4x+4}{10}$
$\frac{2x+2}{5}$

20.

$\frac{2x+3}{2x} + \frac{x+3}{4x} - \frac{18x+6}{8x^{2} }$
$\frac{4x(2x+3)+2x(x+3)-(18x+6)}{8x^{2} }$
$\frac{8x^{2} +12x+2x^{2} +6x-18x-6}{8x^{2} }$
$\frac{10x^{2}-6}{8x^{2} }$
$\frac{5x^{2}-3}{4x^{2} }$

4 0

2 years ago

Find the area of a circle that has a diameter of 60 feet.

IrinaK [193]

Answer:

60π

Step-by-step explanation:

Hullo :D

I think this will be a piece of helpful info:

<em>The formula for finding the area of a circle if πd.</em>

<em />

In that case, we just substitute 60 (our d)

So the area will be 60π

If you want that multiplied, you'll get 188.4 (multiplying by 3.14)

Thus, the answer is $$\boxed{60\pi}$ .

3 0

3 years ago

What is a requirement of supplementary angles? Supplementary angles must be adjacent. Supplementary angles must be nonadjacent.

Alex Ar [27]

Answer:

the measure of supplementary angles must add up to 180

Step-by-step explanation:

complementary angles add up to 90°

angles on a straight line are supplementary angles which add up to 180°

3 0

3 years ago

Mai worked for 12 hours each day for 8 days. Then the next day she worked 7 hours. How many hours did Mai work in all?

Fiesta28 [93]

Answer:

91 hours

Step-by-step explanation:

Add 12 to itself 8 times and then add 7 once

8 0

3 years ago

Write the equation that describes the line with slope = 4 and y-intercept = -2 in slope-intercept form.

JulsSmile [24]

Answer:

2 66

Step-by-step explanation:

beacuse ima gansta and you a cracka so whats up with it

7 0

3 years ago