Question

How do I use the tables to evaluate the expression

Answer 1

Given:

`\begin{gathered} To\text{ find }(fg)(9),\text{ this means:} \\ (fg)(9)=f(9)\cdot g(9) \end{gathered}`

From the table,

`\begin{gathered} f(9)=-4 \\ g(9)=-5 \\ \\ Hence, \\ (fg)(9)=f(9)\cdot g(9)=-4*-5 \\ (fg)(9)=20 \end{gathered}`

Therefore, the answer is 20.