emmanuel180
23.08.2021 •
Mathematics
A washer and a dryer cost 860 combined. The washer costs 90 less than the dryer. What is the cost of the dryer?
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Ответ:
606.6 and 233.3 respectively
Step-by-step explanation:
Let the speed of plane in still air be x and the speed of wind be y.
ATQ, (x+y)*9=7560 and (x-y)*9=3360. Solving it, we get x=606.6 and y=233.3