Which equation demonstrates the additive identity property?
(7+4)+(7-4) - 14
(7+41+0 -7+4
(7+40(1) - 7+4)
(744)+(-7-4)-0

Given that de, df, and ef are midsegments of △abc, and de=3.2 feet, ef=4 feet, and df=2.4 feet, the perimeter of △abc is .

Which of the following represents a number squared is equal to twenty more than nine times that number ? a) x squared = 9x + 20 b) x squared = 20x + 9 c) x squared > 9 + 20x d) x squared = 9 + x + 20

On a piece of paper graph f(x)=5•(0.4)^x