Use the given information to find f '(4).
f(x) = 5g(x) + h(x)
g(4) = -4 and g'(4) = 6
h(4) = 1 and h'(4) = -5
f '(4) = ____
f'(x) = 5g'(x) + h'(x)
Now just plug in your numbers.
f(x) = 5g(x) + h(x)
g(4) = -4 and g'(4) = 6
h(4) = 1 and h'(4) = -5
f '(4) = ____
Now just plug in your numbers.