Question

F(x)=3x+5. G(x)=7x-5 find fog ;gof

Answer 1

Answer:

f o g= 21 x - 10

g o f= 21 x+30

Step-by-step explanation:

f o g= f(g(x))

= 3(7 x-5)+5

=21 x-15+5

=21 x- 10              

g o f=g(f(x))

=7(3 x+5)-5

=21 x+35-5

=21 x+30

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