Can someone help me with this assignment

Which number completes the inequality? 2/3 < _ < 7/9

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.

To decrease an amount by 16% what single multiplier would you use