W: This red shirt is $ 20.00, and the blue one is a dollar more.M: The black one is twice as much as the blue one. How much is the black shirt(). A: $20.00. B: $21.00. C: $42.00. D: $10.00.
W: This red shirt is $ 20.00, and the blue one is a dollar more.M: The black one is twice as much as the blue one. How much is the black shirt(). A: $20.00. B: $21.00. C: $42.00. D: $10.00.
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