Which of the following is the conjugate of the expression below when x 2 4?
11- vx-4
o a. 11+/x-4
o b. 11+x+4
o c. 11-xx-4
o d. 11-_x +4

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?