The direction of the vector -3i -3j is:
225°.
315°.
45°.
135°.
Given the vectors a and b, a + b is:
A.
D.
B.
C.
Given the vectors p and r, then p - r is:
Given that the vectors 6i + 15j and xi − 5j are parallel, the value of x is:
3.
-2.
-3.
2.
Given that the matrix below is equal to 0, then x is:
-6.
8.
