WiFi is stupid and so is online classes thanks for the help everyone in advance!

Problem 3

You subtract 4x from both sides, then divide both sides by -2 to fully isolate y.

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Problem 4

Multiply both sides by r to get

2mr = p-q

which is the same as

p-q = 2mr

The last step is to add q to both sides leading to this final answer

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Problem 5

This is the cube root of (3V)/(4pi)

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Work Shown:

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.