What must the values of a and b be for PQRS to be a parallelogram?
6b P 4a + 1 (6x + 13)° 121 2a +9 121 (7x - 5)° S R 11b - 10
x=18
possible answers:
A) a = 2, b = 5
B) a = 17, b = 12
C) a = 4, b = 2
D) not enough information ​