Question 1056697
Let r be the rate at which Rachel walks. Then Floyd is r+2. So:
12/(r+2)+3=12/r
12r+3r²+6r=12r+24
3r²+6r-24=0
r²+2r-8=0
(r+4)(r-2)=0
r=2, -4
Throwing out the negative answer, we get Rachel's rate at 2 mph, and Floyd's at 4 mph. &#9786;&#9786;&#9786;&#9786;