Can someone please help me with this, I have no idea!! Write a coordinate proof of the following theorem: If a quadrilateral is a kite, then its diagonals are perpendicular.

What are the sotions to the quadratic equation 9x^2=4

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.

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.