Determine a value for k such that the two planes are coincident. -3y+z=-27 -x- 3x+k²y+kz = k* a. k=3 b. k=-2 C. 1 k = d. k = -3 Which of the following is the parametric equation of the line with vector equation r = = (1,2)+5(2,4), s = R? a. x 2t,y 4t, t = R = c. x +1,y=4t+ 2, t = R b. x 4t+2y= 2t+1, € R d. none of the above

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