Help please this is very hard to me

What is the solution to the equation 9^(x+1) =27

Part a: sam rented a boat at $225 for 2 days. if he rents the same boat for 5 days, he has to pay a total rent of $480. write an equation in the standard form to represent the total rent (y) that sam has to pay for renting the boat for x days. (4 points)

Aline passes through 3,7 and 6,9 what equation represents the line