I need help because I dont think i did the slope correctly

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 an equation for the linear function which has slope -10 and x-intercept -7

Benjamin is making bow ties. how many 1/2yards lomg bow ties can he make if he has 18 feet of fabric?