Solve the problem.x represents the number of cassette tapes sold at $10.00 per tape, and y represents the total cost of the cassette tapes. After writing an equation for this situation, what is the total cost of 4 cassettes?
A. $80
B. $20.00
C. $40
D. $2.50
Answer: C
Mathematics
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A. 
B. 
C. 
D. 
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A. y = 2.00x - 0.20 B. y = 0.20x + 2.00 C. y = 0.20x - 2.00 D. y = 2.00x + 0.20
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A. 0 B. Does not exist C. 5 D. 5e5x
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Solve the percent problem.Stevie bought a stereo for $285 and put it on sale at his store at a 55% markup rate. What was the retail price of the stereo?
A. $341.75 B. $570.00 C. $385.00 D. $441.75
Mathematics