Which graph represents the function (x) = - 21 - 1

Plot the points (0,6), (3,15.8), and (9.5,0) using the graphing tool, and find the function

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.

Combine like terms to make a simpler expression 3z+z