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kaiteDID
 3 years ago
At 10:00 a.m. two planes leave an airport. If the northbound plane flies at 280 mph and the southbound at 320 mph, at what time will they be 1,000 miles apart?
{ a.m.}
kaiteDID
 3 years ago
At 10:00 a.m. two planes leave an airport. If the northbound plane flies at 280 mph and the southbound at 320 mph, at what time will they be 1,000 miles apart? { a.m.}

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CliffSedge
 3 years ago
Best ResponseYou've already chosen the best response.0Distance = speed × time.

CliffSedge
 3 years ago
Best ResponseYou've already chosen the best response.0There are two distances and two speeds, but the two distances add up to 1000mi. and the time for both is the same.

CliffSedge
 3 years ago
Best ResponseYou've already chosen the best response.0320×time + 280×time = 1000.

CliffSedge
 3 years ago
Best ResponseYou've already chosen the best response.0You have to find the time.

CliffSedge
 3 years ago
Best ResponseYou've already chosen the best response.0"320+280=1000" would be 'speed + speed = distance' which doesn't make sense.

kaiteDID
 3 years ago
Best ResponseYou've already chosen the best response.0so speed + speed = distance means that it equals 600?

CliffSedge
 3 years ago
Best ResponseYou've already chosen the best response.0Speed + speed = distance is nonsensical and cannot be used. There are two distances that add up to 1000, so you need distance1 + distance2 = total distance. distance1=speed1×time, distance2=speed2×time. The only unknown here is the amount of time.

CliffSedge
 3 years ago
Best ResponseYou've already chosen the best response.0It does reduce to an equation that looks like a single speed of 600mph, and a single time of ? for a single total distance of 1000mi.

CliffSedge
 3 years ago
Best ResponseYou've already chosen the best response.0dw:1349967841261:dw

CliffSedge
 3 years ago
Best ResponseYou've already chosen the best response.0Go back through everything I wrote a little at a time and think about it. I'm sure you'll figure it out.

kaiteDID
 3 years ago
Best ResponseYou've already chosen the best response.0is the time 4:00 a.m.?
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