How would I answer the following vectors questions?

Question 14 (1 point) Listen Question 12 (1 point) Listen What is the value of B for the vector [2, 4, -6]? u = [2, -3, 7] and v = [-1, 6, 5] O al 143.30 124 - 3v| = O b) 74.50 O a) 12.1 b) 13.9 O c) 57.70 cl 24.0 O d) 36.70 O d) 25.0 Question 7 (1 point) Listen The distance between the points (-8, m) and (m, 9) is 13. What are the possible values of m? al -3 or - 4 O b) 3 or 4 O c) 4 or - 3 O d) 3 or- 4