Write an equation where X=3 and Y=9

Which of the following equations is of the parabola whose vertex is at (4, 3), axis of symmetry parallel to the y-axis and focus at (4, -3)? a.) y+3=1/24 (x+4)^2 b.)y-3=-1/24 (x-4)^2 c.)x-4=-1/24 (y-3)^2

9/10 divide by -3/15 as a mixed number

If the value of cos330°is√3/2 then find cos 165°.