Determine the type and number of solutions of x^2-8x+16=0

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?

What function has a range {yly< 5}? question on picture above^

How many roots does the graphed polynomial function have? 1-02