The answer is A. You just solve each one and you would find that it would be the same as 3x=-12.
$1.21 is the original price per pound...i too am having trouble with figuring out how to setup the equation!!
The answer is 150 because
5*30
shortcut: 5*3=15
add the zero from the 50
150 is your answer..
Answer:

Step-by-step explanation:
To solve for s, you need to follow these steps.
First multiply by t both sides of the equation.


We get 
Now we divide by r, both sides of the equation.

Finallly we obtain:
or

Answer:
B. No the input is not feasible
because you cannot rent 6,5 movies :p