Ay Yo, anyone know math? i need some help! please explain yo answer or provide solid proof that its correct /:

Restrictions on f(x) = 1/x+5 and g(x) = x-2

Which expression is equivalent to -5(3x - 6/7)

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?