CCSS Support Math II 3.1.4 Example 3

Topic:
Terms
Rhett bought 7 sacks of fertilizer (f) and 9 sacks of mulch (m) at his local plant nursery. Rhett had a coupon for $6 off his total purchase. Write an expression to represent Rhett’s purchase, and then identify the terms, coefficients, and constants (if any) in the expression. Assume there is no sales tax.