What does Y equal 4(y+1) = -8

Which of the following expressions is equal to 2x^2+8

Which graph represents the function g(x) = |x + 4| + 2?

Parabolas y=−2x^2 and y=2x^2 +k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.