Let f(x) = x2 and g(x) = x - 3. Evaluate the expression. (fºg)(x)
Α. χ2 -3
B. x2 - 6x + 9
C. 2x - 6
D. x2 + 6x + 9

B

Step-by-step explanation:

(fºg)(x) is also f(g(x)).

Therefore:

f(x - 3)= (x-3)^2

f(x-3) = x^2 - 6x + 9

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.