How would I answer the following vectors questions?

Question 8 (1 point) Question 2 (1 point) Listen 1) Listen If u = [-2, 3, 1] and / = [4, 2, -4], then 2 u + 3 7 is equal to: Find the perimeter of the triangle ABC whose coordinates are A(2, 4, 1), B(-1, 2, 2) and C(7, 0, -4): Onone of these options is correct O 27.2 O [4, 2, 3] 18.1 O [4, - 2, -3] 15.1 22.1 O [8, 12, -10] Which of the following vectors is coplanar to [1, 1, 1] and [1, 2, 3]? The x-component of the unit vector in the direction [1, -2, z] is } . What is the value of z O a) [4, 2, -2] O al 1 O b) [1, 4, 8] Obl 2 O cl [7, 5, 3 ] Oc 3 O d) [5, 7, 6] Od) 4 Three vectors a, b and c are such that Question 19 (1 point) a = sb + tc Listen If OA = [3, -1, 4] and OB - [6, -1, 8], find the magnitude of AB : These vectors are. 05 a) Coplanar and linearly dependent O b) Not coplanar and linearly independent O V26 O c) Coplanar and linearly independent Ov5 O d) Not coplanar and linearly dependent Quaction 901 /1 paint