How do you write the point slope form of a linear equation?

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?

Determine the area of a triangle with (see picture below)

(-y to the power of 2 - 4y- to the power of 2 -6 y +3)