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(if f(x)=4x^2 and g(x)=x+1, find (f o g)(x)

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?

Which expression is equal to (f+g)(x)?