Solve for k.
-3+ -2k = 7
k= ?

Solve : -7k+2 = 0 Subtract 2 from both sides of the equation :

-7k = -2

Multiply both sides of the equation by (-1) : 7k = 2

Divide both sides of the equation by 7: k = 2/7 = 0.286

Two solutions: k = 2/7 = 0.286

k = 0

6.5

step-by-step explanation:

you said it was in the question

~courtney

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.