Please don't troll.. I am in desperate need of help, I will give brainliest.

The sum of two numbers is 12 and their difference is 18 what are the two numbers

Acylinder with a base diameter of x units has a volume of jxcubic units which statements about the cylinder are true? check all that apply. the radius of the cylinder is 2 x units. the radius of the cylinder is 2x units. the area of the cylinder's base is 200 square units. the area of the cylinder's base is a square units. the height of the cylinder is 2x units. the height of the cylinder is 4x units. mark this and return save and exit next submit

Precalculus question, image attached.