Sunday

January 25, 2015

January 25, 2015

Posted by **Madison** on Tuesday, August 31, 2010 at 9:32am.

This is what I did and I get 9/20. What am i doing wrong?

1.4x+1/5x=1 which gives u 9/20. I'm so lost...

- Math -
**Reiny**, Tuesday, August 31, 2010 at 9:36amMike's rate = 1/3 lawn/hr

Paul's rate = 1/2 lawn/h

combined rate = (1/3 + 1/2) lawn/hr

= 5/6 lawn/hr

time for combined rate = 1/(5/6) hours

= 6/5 hours

Their answer is wrong.

How can it take 20/9 or more than 2 hours for both of them to do it, when Paul alone could do it in 2 hours.

- Math -
**Bob**, Saturday, October 16, 2010 at 8:11pm6/5hrs

- Math -
**Henry**, Monday, December 27, 2010 at 6:36pmt = 3*2 / (3+2) = 6/5 hrs.

**Answer this Question**

**Related Questions**

Algebra 2 - It takes you 3 hours to mow a lawn & it takes your sister 2 hours to...

MATH - Jack usually mows his lawn in 3 hours. Marilyn can mow the same yard in 5...

smith - tom can mow a lawn in 4 hours. perry can mow the same lawn in 5 hours. ...

algebra - Jack usually mows his lawn in 6 hours. Marilyn can mow the same lawn ...

algebra - it john 4 hours to mow a lawn it takes maria 3 hours to mow the same ...

algebra - Bob mosw his lawn in 3 hours, Jane can mow the same lawn in 5 hours. ...

Math - Suppose that it takes Sally 3 hours to mow, and it takes Tom 4 hours to ...

math - Jack usually mows his lawn in 4 hours. Marilyn can mow the same in 5 ...

math/117 - Jack usually mowes his lawn in 7 hours. Marilyn can mow the same yard...

Math - Jack usually mows his lawn in three hours. Marilyn can mow the same yard ...