What is the main motive behind dealer incentives?

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

According to the number line, what is the distance between points a and b? v ++ + + + + -16 -14 -12 -10 -8 + 6 + 4 + -2 + 0 + 2 + 4 + 6 + 8 + 10 + 12 + 14 + 16 o6 units o 7 units 12 units o 14 units

Which of the following is true for the relation f(x)=2x^2+1