Solve the system of linear equations in three variables. 4x +y – 2z = 0
2x – 3y + 3z = 9
-6x-2y+z = 0

A. (-2, 1/2, 3/4)
B. (1/2, 3/4, -2)
C. (-2, 3/4, 1/2)
D. (3/4, -2, 1/2)

Identify an equation in point slope form for the line perpendicular to y=3x+5 that passes through (4,-1)

Hi, can anyone show me how to do this problem? 100 points for this. in advance

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?