Question 745032
r o q  merely means r(q(x)) and so you are looking to evaluate r(q(1)).


q(1) is the input into r(x).
{{{r(x)= sqrt (x+5)}}}    ,  _____you did not show exactly what you meant,
{{{r(q(x))=sqrt((x^2+3)+5)}}}
Setting x=1, {{{r(q(1))=sqrt(1^2+3+5)=sqrt(9)=+- 3}}}