Suppose that u and v are two vectors with |u| = 1, |v| = 3 and u · v = −2. a. Compute |u + v|. b. Compute |(u + 2v) × v|

Yes, two vertical lines can be complementary

32

step-by-step explanation:

these are your clues: 1. kim ran 18 races2. this was four fewer races than twice thenumber, notice it says twice the number, so you would do the equation 18x2-4; which equals the number 32.thus, 32 is your answer.