we are given two forces
[tex]f_1=(8.6,3.8)[/tex]
[tex]f_2=(8.2,-7.7)[/tex]
Since, force are vector quantities
so, when we add two vectors , we add x-components with x-components
and y-components with y-components
so, we get
[tex]f_1+f_2=(8.6,3.8)+(8.2,-7.7)[/tex]
[tex]f_1+f_2=(8.6+8.2,3.8-7.7)[/tex]
[tex]f_1+f_2=(16.8,-3.9)[/tex]
so, x-component is 16.8.............Answer