What is the area of a triangle with a base of 10 and height of 4?

Astore sells two types of radios. one type sells $87 and the other for $119. if 25 were sold and the sales were $2495, how many of the $87 radios were sold a) 5 b) 20 c) 15 d)10

What is the perimeter of a rectangular building that is 80 feet wide and 140 feet deep?

What are the solutions of the system? solve by graphing. y = -x^2 - 3x + 2 y = -2x + 2