danny left college traveling 9 mph. 3 hours later tyler left traveling in the same direction going 18 mph. how long until tyler meets up with danny?

Question

danny ﻿left ﻿college ﻿traveling 9 mph. 3 hours later tyler left traveling in the same direction going 18 mph. how long until tyler meets up with danny?

jsblumen · Answer

Do you know how to set up a problem like this?

amy2012 · Answer

yes...but the answer I put in is not correct...

jsblumen · Answer

What was the answer you got?

amy2012 · Answer

6

jsblumen · Answer

That's the answer I got, 6 hours, maybe it is asking for the answer in minutes?

amy2012 · Answer

it is asking for hours....I just got it...it was 3. had to subtract 3 from 6

jsblumen · Answer

It must be asking how long after Tyler leaves.

stamp · Answer

danny and tyler will meet once their distances are equal.

recall: d = rt

danny's rate is 9 mph, and tyler's rate is 18 mph.

danny travels for t hours, and tyler travels for 3 less hours since he leaves 3 hours later, so tyler travels t-3 hours..

danny's rt = tyler's rt

9(t) = 19(t -3)

9t = 19t -57 

solve for t