What is the coefficient in the expression?

9n-2

A) 2

B)9

C) n

B) 9

Step-by-step explanation:

The coefficient is the number in front of a given variable (denoted by a letter). In this case, it is 9.

n is the variable.

-2 is the constant.

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the anwser is d) 75°

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.