Find the value of x and y if 50=x+y

Adam used 1072.4 gallons of water over the course of 7 days. how much water did adam use, on average, each day?

50 plz, given the system of equations, match the following items. x + 3 y = 5 x - 3 y = -1 a) x-determinant b) y-determinant c) system determinant match the following to the pictures below.

If you prove that ∆wxz is congruent to ∆yzx, which general statement best describes what you have proved?