Question 887023
Please help me! 

Starting at home, Jessica travelled uphill to the hardware store for 75 minutes at just 4 mph. She then travelled back home along the same path downhill at a speed of 12 mph.

What is her average speed for the entire trip from home to the hardware store and back?
<pre>
On uphill trip, distance traveled: {{{(75/60) * 4}}}, or 5 miles
On downhill trip, time taken: {{{5/12}}} hr
Total distance: 2(5), or 10 miles
Total time: {{{75/60 + 5/12}}}, or {{{15/12 + 5/12}}}, or {{{20/12}}}, or {{{5/3}}} hours

Average speed = {{{total_distance/total_time}}}
Average speed = {{{10/(5/3)}}}______{{{10 * (3/5)}}}____{{{2cross(10) * (3/cross(5))}}}, or {{{highlight_green(highlight_green(6))}}} mph