The top question is already filled out (if you see an error in the top one can you let me know in the comments only please?) and what I need to answer is the bottom question, can any of you help me, please?

The table above shows approximate conversions from gallons to liters. what is the value of x?

7. if the value of x varies directly with the value of y, and x = 3 when y = 21. what is the valu y, and x = 3 when y = 21. what is the value of x when y = 105?

Melanie is buying a bathing suit that costs 39.99. she is given a discount at the cash register of $6.00 when she scratched 15% off on a game piece for a store promotion. what will the sale price of melanie’s bathing suit be?