For the acute △abc, ae and bd are altitudes, ab = 12, bc = 8, de = 3, ae = 5. find the area of △cde.

Find the required measurements of the following trapezoids. a = 8 cm b = 16 cm h = 10 cm

Scarlet bought three pairs of sunglasses and two shirts for $81 and paula bought one pair of sunglasses and five shirts for $105 what is the cost of one pair of sunglasses and one shirt?

Evaluate the expression for the given value of the variable 2×(c2-5) for c=4