One endpoint of a line segment is at (4, 2). the line is bisected by placing the midpoint of the line segment at (−2, −1). what are the coordinates of the other endpoint? a) (−4, −6) b)(−8, −4) c)(10, 5) d)(−8, 4)

the answer will be b x² +x-1

step-by-step explanation:

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.