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a dvd costs twice as much as a music cd. Jack buys 2 dvds and 2 cds and spends $45. Determine how much one cd costs. in dollars
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Sep 17, 2016
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a dvd costs twice as much as a music cd. Jack buys 2 dvds and 2 cds and spends $45. Determine how much one cd costs. in dollars
Mathematics
high-school
Mxro
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v=2c, and 2v + 2c =45 you can substitute v for 2c in the second equation because they equal to get 4c +2c =45 6c =45 c = 45/6, so the answer is $7.50
Ashwani Agarwal
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Sep 19, 2016
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Ashwani Agarwal
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One CD costs
$7.50
.
One DVD costs
$15.00
.
Corey G
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Sep 24, 2016
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Corey G
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