On a coordinate plane, parallelogram a b c d has points (3, 6), (6, 5), (5, 1), and (2, 2).
what is the area of parallelogram abcd?

13 square units
14 square units
15 squa

The value of x in this system of equations is 1. 3x + y = 9 y = –4x + 10 substitute the value of y in the first equation: combine like terms: apply the subtraction property of equality: apply the division property of equality: 3x + (–4x + 10) = 9 –x + 10 = 9 –x = –1 x = 1 what is the value of y?