Question 393001
It took Jan y hours to drive 200 km.  If she had increased her speed by 10km/h and driven for 2 h less, how far could she have gone?  (Hint:  Make a chart.  Answer in terms of y.)
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d= 200
time = y hours
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speed = 200/y
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increase speed by 10
so speed = (200/y)+10
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traveled 2 hours less than before
y-2 hours
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distance = speed * time
d= ((200/y)+10)*(y-2) km
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simplified
d=(200+10y)/y * (y-2)
d=(200+10y)(y-2)/y
d=10(20+y)(y-2)/y km

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m.ananth@hotmail.ca