Help me please if you know the correct answer

What number should be added to both sides of the equation to complete this square? x^2-10x=7

How can the correlation in the scatter plot graph below best be described? positive correlation negative correlation both positive and negative no correlation

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?