How can i evaluate the expression of, m=4 and n=9, n+5m

First substitue. 9+5 (4)

Multiply. 9+20

Add. 29

To evaluate the expression of m=4 and n=9, you would replace the variables (n and m) with the corresponding numbers. Giving you this equation: 9+5 (4).

9+20 once simplified. 29 is your final answer.