Question 610224
Add the first two fractions:

7/10 + 9/12


(7/10)*(6/6) + 9/12


(7*6)/(10*6) + 9/12


42/60 + 9/12


42/60 + (9/12)*(5/5)


42/60 + (9*5)/(12*5)


42/60 + 45/60


(42+45)/60


87/60


So after receiving 9/12 ft of rope from Jane, she now has 87/60 ft of rope


Now subtract off 5/7 (since she's giving this amount to Jerome)


87/60 - 5/7


(87/60)*(7/7) - 5/7


(87*7)/(60*7) - 5/7


609/420 - 5/7


609/420 - (5/7)*(60/60)


609/420 - (5*60)/(7*60)


609/420 - 300/420


(609-300)/420


309/420


(3*103)/(3*140)


103/140


So she has <font color="red">103/140 ft</font> of rope in the end.


Note: 103/140 = 0.7357, which helps confirm that you were on the right track (you just needed to convert to fraction form)



<font color="red">--------------------------------------------------------------------------------------------------------------</font>
If you need more help, email me at <a href="mailto:jim_thompson5910@hotmail.com?Subject=I%20Need%20Algebra%20Help">jim_thompson5910@hotmail.com</a>


Also, please consider visiting my website: <a href="http://www.freewebs.com/jimthompson5910/home.html">http://www.freewebs.com/jimthompson5910/home.html</a> and making a donation. Thank you


Jim
<font color="red">--------------------------------------------------------------------------------------------------------------</font>