Question

URGENT PLZ HELP

for what values of X and Y is quadrilateral ABCD a parallelogram

Answer 1

x = 9

y = 3

Explanation:

Since this is a quadrilateral the opposite side lengths must be equal

5x - 20 = 7x - 38

38 - 20 = 7x - 5x

18 = 2x divide both sides by 2

9 = x same goes for y

6x - 31 = 4y + 11 we already know x = 9 so

6×9 - 31 = 4y + 11

54 - 31 - 11 = 4y

12 = 4y divide both sides by 4

3 = y