Question 9 of 20 : RS
n...
Select the best answer for the question.
9. Simplify this expression: 19-(+8) – (+14) = ?
A. 25
B. 41
C.-7
D.-3
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attachment?

step-by-step explanation:

step-by-step explanation:

bob the banana

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.

a

step-by-step explanation: