Answer:

Step-by-step explanation:

f⁻¹(x) = f(y) = 5y - 1 = x

Answer:
There are a couple different solutions to your equation:

![x=\sqrt[22]{\frac{13}{n}}](https://tex.z-dn.net/?f=x%3D%5Csqrt%5B22%5D%7B%5Cfrac%7B13%7D%7Bn%7D%7D)
![x=-\sqrt[22]{\frac{13}{n}}](https://tex.z-dn.net/?f=x%3D-%5Csqrt%5B22%5D%7B%5Cfrac%7B13%7D%7Bn%7D%7D)

Answer:
12
Step-by-step explanation:
30% is 0.3, 40 x 0.3 . is 12 :DD
291.87 is rational since the last (decimal) numbers aren't repeating.
If it was repeating (291.877777...) it would be irrational.