Question 1048457
Let r be the rate at which Ryan works. Then Eric would be r+1. Then you have:
1/r+1/(r+1)=1/4
4(r+1)+4r=r²+r
r²-7r-4=0
Using the quadratic formula; we get r=7.53112887415, or  -0.531128874149. Throwing out the negative result, It would take Ryan 7.53112887415 hours and Eric 8.53112887415 hours working alone to fill 100 orders. &#9786;&#9786;&#9786;&#9786;