Can someone help me please

How to choose the sign of the radical in the denominator of the formula for the distance from a point to a line.

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

8. kelly wants to buy a magazine that is $25. later the magazine was marked up an additional 20%. what is the new price?