Pls solve I need this today

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

Ithink i know it but i want to be sure so can you me out ?

Idon't get undoing if its pass adding and subtracting so can someone ? x-2 over 5 = 18