magicgeek4980
29.01.2021 •
Mathematics
The price of a mountain bike is $50 more than a road bike. If 4 road bikes and 3 mountian bikes coat $4700. Find the price of a road bike and a mountain bike.
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Ответ:
9514 1404 393
road bike: $650mountain bike: $700Step-by-step explanation:
If r is the cost of a road bike, then the cost of a mountain bike is r+50. The total cost of the 7 bicycles is ...
4r +3(r+50) = 4700
7r +150 = 4700 . . . . . . eliminate parentheses
7r = 4550 . . . . . . . . . . . subtract 150
r = 650 . . . . . . . . . . . . . divide by 7; price of a road bike
r+50 = 700 . . . . price of a mountain bike
The price of a road bike is $650; the price of a mountain bike is $700.
Ответ:
square
Step-by-step explanation: