Question 154040
a decent hint __ let's use it


" Elisa walked a certain distance at 5 mi/h" __ Tw=d/5


"then jogged twice that distance at 8 mi/h" __ Tj=2d/8=d/4


total distance equals d+2d or 3d __ total time equals 2h and 15 min or 9/4 h


Tw+Tj=9/4 __ substituting __ (d/5)+(d/4)=9/4 __ multiplying by 20 __ 4d+5d=45 __ 9d=45 __ dividing by 9 __ d=5


total distance equals 3*(5) or 15 mi