the square root of 81 is 9
Subtract the like terms to get your answer of y^2 - 4y - 6
You need to add up all the sides of the thing thank you
Answer: 
Step-by-step explanation:
To find the inverse of a function start by replacing f(x) with x and replace the original x with y.

Now solve for y

Finally, replace y with the inverse of f(x), 
Answer:
1,451.61 cm²
Step-by-step explanation:
A = LW
A = 38.1 x 38.1 (since a checkerboard has to be square)
A = 1,451.61