Solve for X

(How exactly would I go about doing this?)

What is 10+10+20 about the origin the square root of a triangle.

Ebert used to make $22 an hour, but got a 10% raise. how much more will he make in a 40 hour work week with raise?

Algebraically prove that a clockwise and counterclockwise rotation of 180° about the origin for triangle abc are equivalent rotations.