Which pair of functions are inverses of each other?

Your client has saved $1,860 for a down payment on a house. a government loan program requires a down payment equal to 3% of the loan amount. what is the largest loan amount that your client could receive with this program

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

15 liters is approximately how many gallons