Mel is 3 years older than Jade and Angela is twice as old as Mel. The sum of their ages is 57. How old is Mel? Please answer quickly, its already due. If you don't ant to answer the full answer, you can just give me the equation.

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.

Sara can take no more than 22 pounds of luggage on a trip.her suitcase weighs 112 ounces.how many more pounds can she pack without going over the limit?

If f(x) = x+8 and g(x) = 4x- 3, find (f+g)(x)