On a coordinate plane, a parabola opens to the left. It has a vertex at (0, 0), a focus at (negative 2, 0), and a directrix at x = 2. Which equation represents the parabola shown on the graph?

y2 = –2x
y2 = –8x
x2 = –2y
x2 = –8y

Sherina wrote and solved the equation. x-56=230 x-56-56=230-56 x=174 what was sherina’s error? sherina’s work is correct. sherina only needed to subtract 56 from 230. sherina made a subtraction error when subtracting 56 from 230. sherina should have added 56 to both sides of the equation.

Lola says these two expressions have the same value. expression a expression b which explains whether lola is correct?

What is the value of m in the equation 1/2 m - 3/4n=16 when n=8