Find the coordinates of the midpoint of hx

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left

Find the roots of the equation below. x^2 - 6 + 9 = 0

Apublic library wants to place 4 magazines and 9 books on each display shelf. the expression 4s+9s represents the total number of items that will be displayed on s shelves. simplify the expression