Respuesta :

Quite simple:

(

f

g

)

(

x

)

=

f

(

x

)

g

(

x

)

=

(

9

x

4

)

(

7

x

9

)

=

9

x

4

7

x

+

9

=

2

x

+

5Answer:

Step-by-step explanation: