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greenbyron88
01.09.2019 •
Mathematics
49) a car leaves town at 50 miles per hour. two hours later, a second car, traveling 70 miles per hour, leaves along the same route as the first car. how long would it take for the second car to overtake the first car?
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Ответ:
50 m/h H = 70 m/h (H-2)
50H = 70(H-2) = 70H - 140
This is by virtue of the distributive property of multiplication over addition.
0 = 20H - 140
We subtract 50H from each side.
140 = 20H
We add 140 to each side.
7 = H
We divide each side by 20.
Seven hours is required for the two cars to encounter each other.
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