Suppose that the functions q and r are defined as follows

Question

Suppose that the functions q and r are defined as follows

 

p(x)=x^2+6

q(x)= square root x+9

 

Find the following

(qºr)(7)

(rºq)(7)

Answer 1

r(7) =55

r(x)=x^2+6

q(7) =sqr16 +9= 13

q(x)= sqrx +9

r(q(7))= r(13)= 169+6 = 175

q(r(7) = sqr55+9