Sunday

November 23, 2014

November 23, 2014

Posted by **Stephanie** on Wednesday, December 5, 2012 at 5:08pm.

- Math 310 Math for Teachers -
**Elena**, Wednesday, December 5, 2012 at 5:55pmv(X)=v1

v(Y) = v2

s is the distance between A and B

t is the time before the 1st meeting

v1•t=120,

v2•t=s-120,

{(s-120)+(s-90)} =v1•6,

v2•6=120+90.

=> v2=(120+90)/6=210/6=35 mph

-----

t=120/v1 (1)

2s-210=6•v1 (2)

35•t=s-120 (3)

===

Substitute (1) in (2)

35•120/v1=s-120 (4)

From(3)

s= 3•v1+105 (5)

Plug (5) in (4)

v1² - 5•v1- 35•40=0

v1= 40 mph

**Answer this Question**

**Related Questions**

algebra - two trains leave at the same time from two different stations 284 ...

math - two trains leave at the same time from stations 284 miles apart, ...

math - The distance between Delhi and Meerut is 75km . Two trains at a speed of ...

Physics - Two trains travel on the same railway in opposite direction. The ...

math - the distance between two stations is 300km. two trains start ...

math - Two trains depart at the same time from the same station and travel in ...

math - Two trains depart at the same time from the same station and travel in ...

math - Supppose two trains leave Holbrook, Arizona, at the same time, traveling ...

maths - the distance between two stations is 340 km two trains start ...

math - 2 trains leave the same train station at the same time, one train travels...