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OpenStudy (anonymous):
Stan's Subaru travels 280 miles on an average speed. If the car had gone 5 mph faster, the trip would have taken 1 hour less. Find the average speed. Help!
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OpenStudy (perl):
d = r*t 280 = r * t 280 = (r + 5) * (t-1)
OpenStudy (anonymous):
that's it?
OpenStudy (perl):
now you can solve by substitution
OpenStudy (perl):
they both equal to 280
OpenStudy (perl):
r * t = (r + 5) * (t-1)
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OpenStudy (anonymous):
so r*t=(180+5) (5-1)?
OpenStudy (anonymous):
I ment (280+5)*(5-1)
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