Out of the four choices, it would be A
The magnitude of the vector is √(7^2+12^2)=√(49+144)=√193
The direction is α=arctan(y/x)=arctan(12/-7)≈-59.74 however this is relative to the negative x-axis so we add 180° to get the standard angle...180-59.74=120.26°
So the vector is √193 @ 120.26°
<span> its D -The difference has 4 terms and a degree of 7.</span>
Answer: 7
Step-by-step explanation: I had this question before