I have a 40% off coupon. If I buy a shirt with a regular price of $20, how much money would I save?

only 10/60 isn't equivalent

hope this : )

b.-4 units

all you   do is count how many times you move

step-by-step explanation:

to find if any function is an inverse of the other, put the first equation in as x in the next one. then simplify and solve. if at the end you get the statement y = x, then it is an inverse. if you get anything else, it is not.

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!