Answers

1. Answer:

   1) f(x) = 7x – 3, find F(-2), f(4), and f(O)

   • f(-2) = 7(-2) – 3
     f(-2) = -14 – 3
     f(-2) = -17
     
   • f(4) = 7(4) – 3
     f(4) = 28 – 3
     f(4) = 25
   • f(0) = 7(0) –  3
     f(0) = 0 -3
     f(0) = -3

   2) g(x) = 5 – 2x, find g(-3), g(0) and g(1)

   • g(-3) = 5 – 2(-3)
     g(-3) = 5 – (-6)
     g(-3) = 5 + 6
     g(-3) = 11
   • g(0) = 5 – 2(0)
     g(0) = 5 – 0
     g(0) = 5
   • g(1) = 5 – 2(1)
     g(1) = 5 – 2
     g(1) = 3

   3) h(x) = 8 + 3x, find h(-2), h(4), and h(0)

   • h(-2) = 8 + 3(-2)
     h(-2) = 8 – 6
     h(-2) = 2
   • h(4) = 8 + 3(4)
     h(4) = 8 + 12
     h(4) = 20
   • h(0) = 8 + 3(0)
     h(0) = 8 + 0
     h(0) = 8

   4) k(x) = 9x – 16, find k(-1), K(0), and k(5)

   • k(-1) = 9(-1) – 16
     k(-1) = -9 – 16
     k(-1) = 25
   • k(0) = 9(0) – 16
     k(0) = 0 – 16
     k(-1) = -16
   • k(5) = 9(5) – 16
     k(5) = 45 – 16
     k(5) = 29

   5) A(x) = – 6x + 2, find A(-3), A(0), and A(7)

   • A(-3) = -6(-3) + 2
     A(-3) = 18 + 2
     A(-3) = 20
   • A(0) = -6(0) + 2
     A(0) = 0 + 2
     A(0) = 2
   • A(7) = -6(7) + 2
     A(7) = -42 + 2
     A(7) = -40

   6) T(x) = 11x + 4, find T(-1), T(4), & T(0)

   • T(-1) = 11(-1) + 4
     T(-1) = -11 + 4
     T(-1) = -7
   • T(4) = 11(4) + 4
     T(4) = 44 + 4
     T(4) = 48
   • T(0) = 11(0) + 4
     T(0) = 0 + 4
     T(0) = 4

   All you must do to solve these problems are to put the given numbers in place of x and solve the multiplication, addition, and subtraction.
   For example, in given problem T(4), 4 replaces the x both in the parenthesis next to the T and next to the 11.

   I hope this helps.

   Reply