Any help would be great

Which point on the x-axis lies on the line that passes through point c and is parallel to lino ab?

Atriangle has an area of 72 square inches. if the base of the triangle has a length of 18 inches, what is the height of the triangle? use the formula for the area of a triangle: area = (base)(height) type a numerical answer in the space provided. do not include the units or spaces in your answer.

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base