Question

If f(x)=3x and g(x)= x + 4

Answer 1

Answer:

f[g(1)]= 15

Step-by-step explanation:

f(x)=3x

g(x)=x+4

so you are asked to find fof(g(1))

you first find g(1)= 1+4=5

now you substitute it into f(g(1))

so you now have f(5)

f(5)= 3×5=15

Answer 2

Answer:

$f(g(1))=15$

Step-by-step explanation:

$f(x)=3x\\g(x)=x+4\\f(g(1))$

First, you need to evaluate $g(1)$:

$g(1)=(1)+4\\g(1)=5$

Now, you plug this into $f(x)$ and evaluate $f(5)$:

$f(5)=3(5)\\f(5)=15$

Now you know $f(g(1))=15$.