Work out the balance for £720 invested for 4 years at 5% per annum

Tom wants to order tickets online so that he and three of his friends can go to a water park the cost of the tickets is 16.00 per person there is also a 2.50 one-time service fee for ordering tickets online write an expression in term of n that represents the cost for n ordering tickets online

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

The sum of these consecutive integers is equal to 9 less than 4 times the least of the integer. find the three integers