Question

Find the value of f(3) for each of the following:

Answer 1

Answer:

Step-by-step explanation:

1) f(x) = 7 - 8x²

f(3) = 7 - 8*3²

     = 7 - 8*9

     = 7 - 72

f(3) = -65

2) f(a) = -5(a-2)

f(3) = -5(3 -2) = -5 * 1 = -5

$3)f(h) =\dfrac{-h}{72}\\\\\\f(3)=\dfrac{-3}{72}=\dfrac{-1}{24}$

4) f(m) = m(m +4)

f(3) = 3*(3+4) = 3 * 7 = 21