(i) x + 3x”y + 6xy? - y from y? - 5xyl - 4x”y (k) a? +2a+b+ 2ab from 2a²b + 7ab - 6
(m) -7a + 6b + 10c from -6a + 5b + 9c
) - 3m +
(1) 6x3 - 8
(n) x² - 2²
pls help pl​

the first one, all those points on the line just make a strait line.

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.