I need help!! This stuff hard hard

What is the slope of the line that contains the points (4,8) and (9,8)? what type of line is it?

1. are the triangles similar and if so why? what is the value of x? show your work.

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