SA=lp + B
SA(11.7) (16)+64
SA 93.6+64
SA-157.6cm²

The solution set for 5v2 – 125 = 0 is

Starting at home, emily traveled uphill to the hardware store for 606060 minutes at just 666 mph. she then traveled back home along the same path downhill at a speed of 121212 mph. what is her average speed for the entire trip from home to the hardware store and back?

Having a hard time understanding this question (see attachment).