True or false: If a < b then a + c < b + c

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.

If you could answer these your a life saver

Cal's go cart has a gas tank with the dimensions shown below. he uses a gas can that holds 11 gallon of gas, to fill the go cart tank. 11 gallon = 231 inches^3 how many full gas cans will it take to fill the go cart's gas tank?