Lizzie has volunteered 20 hours at her town library. from now on she plans to volunteer 5 hours per week. write an algebraic expression to represent the total number of hours she will volunteer. write a verbal model. choose a variable for unknown quantity

Mr and mrs smith buy tickets for themselves and their four children. the cost of an adult ticket is ? 6 more than the adult ticket. the total cost of the six tickets is ? 40.50 work out the cost of an adult ticket. in your working let c be the cost of the child ticket and a be the cost of the adult ticket.

You deposit $5000 each year into an account earning 3% interest compounded annually. how much will you have in the account in 30 years?

Factor the polynomial 4x4 – 20x2 – 3x2 + 15 by grouping. what is the resulting expression? (4x2 + 3)(x2 – 5) (4x2 – 3)(x2 – 5) (4x2 – 5)(x2 + 3) (4x2 + 5)(x2 – 3)