Answer:
16.50
Step-by-step explanation:
divide it to the upper thanks
A hobby store is having a sale on picture frames buy 3 get the 4th one at 75% off. What is an expression to represent total cost of 4 frames.
For this case we have the following system of equations:

Equating the equations we have:

To find the solutions we factor the equation. To do this, we look for two numbers that, when multiplied, result in -3 and when added, result in -2.
These numbers are: -3 and +1

Thus, the factored equation is:

Then, the solutions for the variable "x" are:

We find the solutions for the variable "y":

Thus, the solutions are:

ANswer:

Answer:
222
Step-by-step explanation: