How many ounces of a 20% alcohol solution must be mixed with 19 ounces of a 25% alcohol solution to make a 21% alcohol​ solution?

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?

X^2/100+y^2/25=1 the length of the major axis is: a)5 b)10 c)20

How much money does ron have left each month after his fixed expenses? ron graduated from college five years ago. he recently bought a house, but shares it with a housemate who pays him $800 a month for rent and utilities. ron is putting a budget worksheet together so he will have a better idea of where his money is going and where he can save. enlarge