Answer:
Canada = 20 minutes
United States = 30 minutes
Mexico = 15 minutes
Step-by-step explanation:
lets use c for Canada, u for United States, and m for Mexico in the following equations to match each condition.
.10c + .20u + .30m = 12.50 -> move all the decimals to the right twice for 10c + 20u + 30m = 1250 (it will still have the same results)
2m = u (talked to U.S twice as he talked to Mexico.)
m + c = 35 (total minutes talking for Mexico and Canada)
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vvv Using the answers provided vvv
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.10(20) + .20(30) + .30(15) = 12.50
2(15) = (30)
(15) + (20) = 35
