Final answer:
To simplify the expression 15(4m + 20), multiply each term inside the parentheses by 15 to get 60m + 300, and that is the simplified expression as there are no like terms to combine.
Step-by-step explanation:
To simplify the expression 15(4m + 20) using the distributive property, you multiply the number outside the parentheses by each term inside the parentheses. Apply the distributive property as follows:
15 × 4m = 60m
15 × 20 = 300
So after distributing, the expression becomes 60m + 300.
There are no like terms to combine further in this case, so the simplified expression remains 60m + 300.