Nine times the sum of nine and a number is -25. What is the number

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

Find the maximum value of p= 4x + 5y subject to the following constraints :

Becca wants to mix fruit juice and soda to make a punch. she can buy fruit juice for $3 a gallon and soda for $4 a gallon. if she wants to make 28 gallons of punch at a cost of $3.25 a gallon, how many gallons of fruit juice and how many gallons of soda should she buy?