What is the line of symmetry for the parabola whose equation is y = 3x2 + 24x - 1? x = -8 x = -6 x = -4

Which of the following expressions is equal to 2x^2+8

Solve the system of equations y= 3/2 - 1, -x+ y =-3

Lin is writing an equation to model the proportional relationship between y, the total cost in dollars of downloading videos from a website, and x, the number of videos downloaded. she knows that the total cost to download 3 videos was $12. her work to find the equation is shown below. joylin’s work step 1 k= 3/12= 0.25 step 2 y= 0.25x where did joylin make her first error?