Make r the subject
P=10(q-3r)/r

If a =6, what is the value of 2a(3b + 5c)?

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.

One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)