Question 11 1 pts Which of the following is not an example of a vector? 0 displacement 0 speed all of the given choices are vectors 0 force 0 velocity ' Question 12 1 pts Which statement is always true? 0 Equivalent vectors have the same magnitude 0 Parallel vectors have the same direction 0 Vectors are subtracted by adding the opposite The resultant of two opposite vectors is the zero vector Question 13 1 pts In three space, which is the definition of skew lines? O none of these choices O Lines that are perpendicular Non-parallel, non-intersecting lines O Lines that are parallel O Lines that intersect in a pointQuestion 14 1 pts Which vector equation represents a line through A(4, 3, 1) and B(72, 1,0) 0 [31,952] : [4,3,1] + t[2,4, 1] 0 [112,952] : [4,3,1] [ t[6,2, 1] none of these choices 0 [33, y, z] : [2, 1, 0] + t[6, 2, 1] O [m,y,z] : [4,3,1] +t[2,1,0] Question 15 1 pts a H -* A # Which expression is equivalent to 2(3i j | k) (i | 213) O [5, 2,4] [53 23] 0 [5,2,0] 0 53," 23 0 none of these choices Question 16 1 pts Which statement is not true? 0 A line in two-space can be represented by a vector equation 0 All of the given statements are true 0 A plane in three-space can be represented by a vector equation 0 A line in three-space can be represented by a scalar equation A plane in three-space can be represented by a scalar equation Question 17 1 pts Which scalar equation represents the same line as [55, y] = [2, 2] + t[3, 1] Om3y+8=0 O3my820 O3m+y4=O none of these choices Om+3y+420 Question 18 1 pts Which expression is meaningless? O a . b . c O a . b x c Oaxb . c Oaxb x ZQuestion 19 1 pts Which statement is not correct? 0 All the statements are correct Question 20 1 pts Which expression represents a unit vector in the same direction as [1, 2, 71] Question 21 1 pts Which statement best describes 71 and T2? 71 : 2x - y+ 3z - 4=0 712 : 4x - 2y + 6z - 7= 0 O 71 and 72 are parallel O 71 and 72 are parallel and coincident O 71 and 72 intersect at a single point O T1 and 72 are parallel and distinctQuestion 22 1 pts Given vectors u and v and scalar k, which is meaningless? Ou . v Our Oux v O ku