Question 1

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Question 2

1)

$f(x) = 2x - 5\\f(4) = 2(4) - 5 = 8 - 5 = 3$

2)

$f(x) = 2x - 5\\f(-6) = 2(-6) - 5 = -12 - 5 = -17$

3)

$g(x) = x + 3\\g(8) = 8 + 3 = 11$

4)

$h(x) = 4x\\h(5) = 4 \cdot 5 = 20$

5)

$k(x) = x^2 + 2x - 5\\k(6) = 6^2 + 2 \cdot 6 - 5 = 36 + 12 - 5 = 43$

6)

$k(x) = x^2 + 2x - 5\\k(-3) = (-3)^2 + 2(-3) - 5 = 9 - 6 - 5 = -2$

7)

$g(x) = x + 3\\g(3x) = 3x + 3 = 3(x + 1)$

8)

$f(x) = 2x - 5\\f(4x) = 2(4x) - 5 = 8x - 5$

9)

$h(x) = 4x\\h(5t) = 4(5t) = 20t$

10)

$k(x) = x^2 + 2x - 5\\k(4t) = (4t)^2 + 2(4t) - 5 = 16t^2 + 8t - 5$

11)

$f(x) = 2x - 5\\f(x + 3) = 2(x + 3) - 5 = 2x + 6 - 5 = 2x + 1$

12)

$f(x) = 2x - 5\\g(x) = x + 3\\f(g(x)) = 2(x + 3) - 5 = 2x + 6 - 5 = 2x + 1$

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