Are the graphs of the lines in the pair parallel? y= 4x+6 -15+3y=-45

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

The weekly revenue for a company is r = 3p^2 + 60p + 1060, where p is the price of the company's product. what price will result in a revenue of $1200.

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?