Marc sold 400 tickets for the school play. Student tickets cost $2 and adult tickets cost $4.Marc’s sales totaled 1500. How many
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Let 
be the amount of parts the student answered correctly. Suppose that 
is a function between and the score of a student's project. As the student initially receives a fixed 
points for turning the project in and 
points for each correct part, the function is initially:
When the students receive
points for each correct part, the coefficient of changes, as the amount of points received per correct answer increases. Thus:
.
When the students receive