The sum of the digits of a certain two-digit number is 9. when you reverse its digits you increase the number by 63. what is the number?

(40 points) i need some . an answer definition is appreciated as well.

Ineed i been stuck on this question since yesterday

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