Question 102852
time=distance/rate ... let x=speed ... 45/60=.75


(10/x)+(25/(x+10))=.75 ... 10(x+10)+25(x)=.75(x)(x+10) ... 40x+400+100x=3x^2+30x


3x^2-110x-400=0 ... (3x+10)(x-40)=0 ... x=-10/3 and x=40 ... negative value not realistic