Question

For f(x)=7x and g(x)=x+5, find (fog)(4)

Answer 1

Answer:

  63

Step-by-step explanation:

Compositions are evaluated right to left.

Evaluation

Each function is evaluated by replacing the variable with the value of the argument.

  $(f\circ g)(4)=f(g(4))=f(4+5)=f(9)=7\cdot9\\\\\boxed{(f\circ g)(4)=63}$