For the following functions, describe the transformations from the parent function, y = b^x in words.
20. y = 3•(1/2)^x+5 -7

22. y = 1/4•2^x-3 +12

JUST 20. AND 22.

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?