Question

If f(x)= (-2)/3 x+9 and g(x)=5x^2-2x+9, find the following.

SHOW ALL WORK PLEASE <3

a. f (-18) =

b. g (6) =

c. f (9) + g (-3) =

d. f (-15) – g (2) =

e. f (8) + g(4)=
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Answer 1

21 , 177, 63 , 44, 84 2/3

Explanation:

a. f(-18) =

-2/3 (-18) + 9

12 + 9

21

b. g(6) =

5(6)2 – 2(6) + 9

5(36) – 2 (6) + 9

180 – 12 + 9

177

c. f(9) + g(-3) =

-2/3 (9) + 9 + 5(-3)2 – 2(-3) + 9

-2/3(9) + 9 + 5(9) – 2(-3) + 9

-6 + 9 + 45 + 6 + 9

63

d. f(-15) – g(2) =

-2/3 (-15) + 9 + 5(2)2 – 2(2) + 9

-2/3(-15) + 9 + 5(4) – 2(2) + 9

10 + 9 + 20 - 4 + 9

44

e. f(8) + g(4) =

-2/3 (8) + 9 + 5(4)2 – 2(4) + 9

-2/3(-15) + 9 + 5(16) – 2(4) + 9

-16/3 + 9 + 80 – 8 + 9

254/3

84 2/3