Question

Let f(x) = 5x + 2 and g(x) = x² + 2x + 5. Evaluate the following.

Answer 1

Answer:

A. 7

B. -3

C. 8

D. 13

E. 5a+17

F. $a^{2}$ + 8a + 20

Step-by-step explanation:

A. f(1) = 5*1 +2, which equals 7

B. f(-1)= 5(-1)+2 which equals -3

C. g(-3)= (-3)^2+ 2(-3)+ 5 = 9- 6+ 5 = 8.

D. g(2)= (2)^2+ 2(2)+ 5= 4+ 4+ 5= 13.

E. f(a+3)= 5(a+3)+2 = 5a+ 15+ 2= 5a+ 17.

F. g(a+3)= (a+3)^2+ 2(a+3)+ 5= $a^{2}$+ 6a+ 9+ 2a+ 6+ 5= $a^{2}$+ 8a+ 20.