we are given that
angle is 4x-11
and that angle is at right angled
so, it's value will be 90
so, we can set 4x-11 to 90
we get
[tex] 4x-11=90 [/tex]
now, we can solve for x
[tex] 4x-11+11=90+11 [/tex]
[tex] 4x=101 [/tex]
[tex] x=25.25 [/tex]............Answer
