HELP ME PLZ ASAP IT WOULD MEAN A LOT

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

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)

Write two point-slope equations for the line passing through the points (6, 5) and (3, 1)