mamaKelly2266
06.05.2020 •
Mathematics
Claudia buys 12 postcards, 12 stamps, and 1 pen. The postcards cost twice as much as the stamps. The pen costs $1.50. The total cost is \$14.10 . How much doe each postcard cost? answer
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Ответ:
Ventilation allows you to breathe in the oxygen that your lungs hold.