If x-5=2 then find the value of 6x-20

Which of the following is the result of expanding

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)

0if x and y vary inversely and y=6 as x=7, what is the constant of variation?