Find the slope of the line through each pair of points ( 12, 20).(-6, -16)

m = 2

Step-by-step explanation:

(x1,y1)=(12,20)

(x2,y2)=(-6,−16)

Use the slope formula:

m= y2 - y1

x2 - x1

(-16 - 12)/ (-6 - 20) =

-28/-26

=2

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.