Please help me with the questions 4-9, thank you in advance! :)

Valentina is subtracting from . she finds the lcd to be 15y2. what is valentina's next step?

What is the anwers for 9+2x=5x-3-x

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