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25 June, 08:24

Harriet is comparing the costs of calling cards. To use card A, the cost is $1.00 to connect and then $0.04 per minute. To use card B, it costs $0.65 to connect and then $0.06 per minute. For what number of minutes does it cost the same amount to use each card for a single call?

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  1. 25 June, 08:27
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    1 +.04m =.65 +.06m 1 -.65 =.06m -.04m. 35 =.02x. 35/.02 = x 17.5 = x
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