The points L, M, N and O all lie on the same line segment, in that order, such that the ratio of LM :MN: NO is equal
to 2 : 2:1. If LO 30, find MN.

is this a multiple choice question?

if so it's a and c

answer: it's d

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.

what chart am i supposed to follow?