Karen Randolph is a marketing manager for a computer software company. When she was promoted, she received a 12% salary increase. The new monthly salary is $5388. What was Karen's salary before the promotion? Round your answer to the nearest dollar.

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.

the answer is d.x= 90°

y= 50°

arc lm= 100°

i got this one chief