Emanuel has 745 pictures in his phone, His memory is getting full, so he starts deleting 20 pictures every day, Define each variable and write an algebraic expression to describe the number of pictures left on his phone after any given number of day

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.