Points A(-2, 4), B(1,3), C(4,-1) and D form a parallelogram. What are the coordinates of D. O A (5, 5)
OB. (0, 0)
OC: (1, -2)
D(1, 0)
O E. (3, 4)

my answer is$ 12

step-by-step explanation:

because 15 -2=12

9 x 8 divided by (5-3)=36

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.