Could someone please help me on this question?

Option 3

Step-by-step explanation:

2x³ + x² - 6x + 27

If (x+3) is a factor, x = -3 is a root

2(-3)³ + (-3)² - 6(-3) + 27

-54 + 9 + 18 + 27

= 0

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.