It is 800 b because 40 times 20 ( half of 40 =800

1. Remove the parenthesis using the next rules:

2. Start to remove the parentheses from the center to the edges:

<h2>Then, the solution is 8</h2>
Ans: x/2
Let , y = f(x)
y= 2x
X=y/2
so ,f^-1(x) = x/2
I hope this helps :)
This isnt a multi choice.. so you have to divide here.
Answer:
-52 / 5
Step-by-step explanation:
3 9/10 * -8 / 3 = 39 / 10 * -8 / 3 = -52 / 5