How would you solve these questions?

These functions exists (and are invertible) as long as the denominators are not zero: so we want

for , and

for

Now we show that they are inverses of each other: we want to show that

. Let's start with . We have

And in the very same way we show that

use an equation of ratios to determine the amount of gas needed to fill the tank.

    0.2             0.8

  =    

288.75             x

                                                              231 gal

so, 0.2x = (0.8)(288.75 gal), and x = = 1155 gal.

                                                                0.2

it would take 1155 gal. to fill the tank.

the cost would be

1155 gal         $3

* = $3465   (answer)

      1           1 gal

hope this you

use google you idiot omg you're so annoying

step-by-step explanation: