Answer:
Magnitude = 8.6
Angle = 324.5 degree from + X axis in counter clock wise direction.
Explanation:
X component of B, Bx = 7
Y component of B, By = - 5
The magnitude of the resultant is
[tex]B =\sqrt{7^{2}+(-5)^2}\\\\B =\sqrt{49+ 25}\\\\B = 8.6[/tex]
The angle is given by
[tex]tan\theta=\frac{By}{Bx}\\\\tan\theta = \frac {-5}{7}\\\\\theta = 324.5^{o}[/tex]
