Which statement describes a many to one function

What expression is equivalent to (2x-1)(x-3)?

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 radical expression is a rational number? a. √ 360 b. √ 644 c. √ 225 d. √ 122