How would you answer these?

Question 1 (1 point) Which of the following vectors is not perpendicular to vector u =(-5, 2, 1)? O al v = (3, 7, 1) Obj v = (-2, -10, 10) O cv= (1, 2, 1) O d) v= (4, 5, 8) Oe) NO RESPONSE Question 2 (1 point) If Car A is travelling north at 50 km/h and Car B is travelling south at 60 km/h, the velocity of Car A relative to Car B is a) 110 km/h north O b) 10 km/h north c) 110 km/h south O d) 10 km/h south Oel NO RESPONSE Question 6 (1 point) A vector of length 5 perpendicular to both u = (3, -1, 5) and v =(2, 1, 0) has coordinates Question 3 (1 point) O a) (- -25 V150' V150' V150 Given three vectors, u, v, and w, if u . (v x w) = 0, what geometrical result can be concluded? Ob) (-25, 50, 25) ( al u, v, and w are mutually perpendicular Od -V150' V/130' V150 (bl u, v, and w are on the same plane O d) (-5, 10, 5) Ocl v, and w, are parallel, and both are perpendicular to u O d One of u. v, or w must be 0, Oe) NO RESPONSE el NO RESPONSE Question 5 (1 point) Suppose u and v are non-zero, parallel vectors. Which of the following could not possibly be true? O a) u . v = lullvl Question 4 (1 point) The plane (x, y. z) = (4. 2, 1) + s(1, 1, -2) + t(2, -1, 3), converted into scalar form, has equation Oblutv =0 a) 4x + 2y + 2 - 5 = 0 Ouxv= lulz b) 2x - y - 6z = 0 O d) lul + 1v1 = 2lul 15 c 3x + z - 13 =0 O e) NO RESPONSE Od) x - 7y - 3z + 13 = 0 O el NO RESPONSE