Hiii! Good morning and I hope you are ok! Please help me here though!

Adam used 1072.4 gallons of water over the course of 7 days. how much water did adam use, on average, each day?

Julie goes to the sports store and spends $40.50 before tax. she buys a pair of shorts for $21.75 and 3 pairs of socks that each cost the same amount. how much does each pair of socks cost? $$

What is r i 4.5+10r=-6.5 with work pls