PLZ HELP Marianne tracks her progress on her reading assignments in the table below. Number of Total

pages assigned Number of Pages Red Percent Read

Wk 1: 70 __ 90%

Wk 2: 75 30 ___

Wk 3: ___ 40 80%

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.

you have to find the same variables -3n - 5n so this would be -3n +(-5n) which equals -9n