How much space is shown in the circle below

Use circumcenter theorem to solve for the given values

Which value of m will create a system of parallel lines with no solution? y= mx - 6 8x - 4y = 12

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?