Expand and simplify (X+7) (x-2)

Urgent please my teacher threatened me with an axe​

What is the value of x in the following equation. -x ^3/2 = -27

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

What is the radius of a circle with an area of 78.5 cubic inches? use 3.14 for pie