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Divide the cost of the event by the cost of the tickets to find how many tickets are required to break even 200/12 = 16.67

17 tickets would need to be sold to make any profit. 

a) 6x+8=2x, 8=-4x, x=-2

b) q² + 7q -3q - 21, q² + 4q - 21

First you need to draw a set of axis and choose a sensible scale, This is detrmined by parts of the equation such as the x and y intercept. Then what we need to do is to make a table of values. We can do ...