How do you convert 79 dollars to cents

When 142 is added to a number the result is 64 more times the number my options are 35 37 39 41

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 ordered pair is a solution of the equation? 2x+3y=10