Which is the equation of a parabola with Vertex (0,0) and directrix x= -2? x² = -8y
a. y2 = 8x
b. y2 = -8x
C. x2 = -8y
d. x2 = 8y

You download a video game to your computer. you have a 60-minute free trial of the game. it takes 5 1/6 minutes to set up the game 7 1/3 minutes to play each level. you want to find out how many levels you can play for free.which inequality describes the number of levels, l, you can play in 60 minutes? can you play 6 levels during your free trial? i need ,

What is the standard deviation of the following data set rounded to the nearest tenth? 3, 17, 18, 15, 12, 21, 9

Which graph corresponds to the function f(x) = x2 + 4x – 1?