Is 14(x+2x+7y-3y) équivalent to 42x-56y

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.

Find the domain and range of the following function f(x) = 51x - 21+ 4

Select the correct answer and solve for y