Aand b have opposite directions, and they both have a magnitude of 7. what must be true about a and b? a. they are equal and parallel. c. they are opposites, but not parallel. b. they are equal, but not parallel. d. they are opposites and parallel.

Option d

They are opposites and parallel.

Step-by-step explanation:

Although they have the same magnitude, one can not say that a and b are equal because they have opposite directions.

If we know that both vectors have opposite directions then necessarily a and b must be parallel.

So what we know about a and b is that they are parallel and opposite.

The correct answer is the option d

c) yes, because of asa or aas