What does three fourths minus one half equal?

Which representation has a constant of variation of -2.5

Mackenzie needs to determine whether the rectangles are proportional. which process could she use? check all that apply.

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?