I just took the test on k12 and the answer is 2/9
** do not simplify it
Answer:
21 = n
Step-by-step explanation:

-5 - 5
________________
-⅓<em>n</em> = -7
____ __
-⅓ -⅓
21 = <em>n</em>
* Dividing by a fraction is the exact same as multiplying by its <em>multiplicative</em><em> </em><em>inverse</em>:

I am joyous to assist you anytime.
So the function is f(x)=2x+1
For the inverse function just replace f(x) with y and solve for x.
y=2x+1
y-1=2x
x=y/2 -1/2
Now to get the same labels replace x with f(x) and y with x to get
f(x)=x/2 - 1/2
B is the correct answer because you multiply length times width