1. Find a • b. a = <7, 4>, b = <3, 5>

A. 41
B. <10, 9>
C. -1
D. <21, 20>

2. Find a • b.
a = 10i + 9j, b = 4i + 3j

A. <40, 27>
B. <14, 12>
C. 67
D. -13

3. Find the angle between the given vectors to the nearest tenth of a degree.
u = <8, 7>, v = <9, 7>

A. -8.3 degrees
B. 1.7 degrees
C. 3.3 degrees
D. 13.3 degrees

4. Determine whether the vectors u and v are parallel, orthogonal, or neither.
u = <10, 6>, v = <9, 5>

A. Orthogonal
B. Parallel
C. Neither

5. Evaluate the expression:
v•w
Given the vectors:
r = <5, -5, 2>; v = <2, -8, -8>; w = <-2, 6, -5>

the answer is 1 becuz if it were 1.0 that would rip apart the entire so ya. : )

~potato.

copyright potato 2019.

your answer   is c

step-by-step explanation:

1. 180°. the sum of the interior angles of a triangle is 180°, for the equilateral triangle that it has three equals side is 60°+60°+60°=180°.

2. 60°. each interior angle of a equilateral triangle is 60°

3. 120°. the measure of ∠m is 120°, the sum of the angles ∠m and ∠n is equal to 180°. so, in order to find the measure of ∠m, we have ∠m+∠n=180° > ∠m=180°-∠n > ∠m=180°-60°=120°.

4. 360°. the sum of the exterior angles of an equilateral triangle is ∠m+∠r+∠x=120°+120°+120°=360°. the exterior angles of any triangle always add 360°.