The answer to your question is
8x + 8
Hello :
f(x) = 3x f-1(x) = x/3
<span>f(f-1(x)) = f(x/3) = 3(x/3) = x
</span><span>f-1(f(x)) = f-1(3x= 3x/3=x</span>
Where are the pairs. Only one x input must match to 1 y output
So for the triangle you would use the formula A= 1/2 bh (b represents the measurement of the base, h represents the height)
A= 1/2 30(40)
A= 1/2 1200
A=600
Now for the rectangle you use the formula A= l x w (l represents length, w means width)
A= 100 x 40
A= 4000
Now you just add the two answers together
A= 4000 + 600= 4600
