Question 1183443
We know that the resultant is the sum of two vectors, vector a and b. Hence,
r=<0+11,7+0>
r=<11,7>
where r is the resultant
the formula of the magnitude is given by the absolute of the vector(s)
|r|={{{sqrt((x^2)+(y^2))}}}
|r|={{{sqrt((11^2)+(7^2))}}}
solve the value for your self

For the angle, Θ={{{arctan(y/x)}}}, in which we refer from the resultant vector's values.Therefore

Θ={{{arctan(7/11)}}}

*Note: two answers are to be yielded either in the radian form or degrees form. Be sure to check what unit is to be outputted from your calculator