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OpenStudy (anonymous):
The disc jockey for the school dance charges $100 per hour for 3 hours plus $50 for each additional 20 minutes. If the disc jockey sends a bill for $450, how many additional minutes did the disc jockey continue to play past the first 3 hours. Please write an equation.
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OpenStudy (anonymous):
y=(450-3*100)/50
OpenStudy (anonymous):
played 60 min extra
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