(x+6)(−x+1)=0 greatest x and least x = 0

At 6 1/2 cents per pound of string beans how much does 7 pounds cost

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?

Could someone me with this question i’ve been stuck on it for 20 minutes