If Sam is paid biweekly and his annual salary last year was &32,000

Tim open up a new saving account with a $50 deposit and plant to deposit $20 per week into the same account. write an expression to represent the total amount in his savings account.

How many quarts of a 50% solution of acid must be added to 20 quarts of a 20% solution of acid in order to get a 40% solution of acid?

Write the factored form of this trinomial 9x^2+18x-7