Help pls will give brainlist and points

Write the expression 7x^3-28xy^2 as the product of 3 factors

Aschool allots ? 1500 to spend on a trip to the theatre. theatre tickets have a regular cost of ? 55 each and are on offer for 1 5 off. a train ticket for the day will cost ? 12 each. if 2 teachers and the maximum number of students attend, how much money will the school have left over?

Adeposit of 5500 at 6% for 3 years equals