22-09-2017
Mathematics

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Noelle and karina both leave the Internet cafe at the same time, but in opposite directions. If karina travels 9 mph faster than noelle and after 8 hours they are 232 miles apart, how fast is each traveling?

Respuesta :

22-09-2017

Noelle goes east at N mph.
Karina travels west at N + 9
then their velocity between them is (N + N + 9)
After 8 hours they travel 8(2N + 9) = 232
(2N + 9) = 29
2N = 20
N = 10 mph for Noelle
N+9=19 mph for Karina

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