Question

2. Andrea and Casey work at a restaurant over the summer. Andrea gets paid $25 when they

work along with an average of $9 in tips every hour. Casey only gets $10 when they work,
but they make an average of $14 in tips every hour. Write a system of equations to determine
how many hours it takes for Andrea and Casey to make the same amount of money? How
much money is it?

Answer 1

So Andrea and Casey each make $52 after working for 3 hours.

Explanation:

Let's call the number of hours that Andrea and Casey work "x".

The amount of money that Andrea makes in a given hour can be represented as 25 + 9x.

The amount of money that Casey makes in a given hour can be represented as 10 + 14x.

We want to find the number of hours it takes for Andrea and Casey to make the same amount of money, which we can represent as:

25 + 9x = 10 + 14x

To solve for x, we can isolate x by subtracting 10 from both sides of the equation:

15 + 9x = 14x

Next, we can isolate 9x by subtracting 14x from both sides of the equation:

15 = -5x

Finally, we can divide both sides of the equation by -5 to solve for x:

-3 = x

So it takes 3 hours for Andrea and Casey to make the same amount of money. To find the amount of money, we can plug in x = 3 back into either of the equations:

Andrea's equation: 25 + 9x = 25 + 9 * 3 = 25 + 27 = 52

So Andrea and Casey each make $52 after working for 3 hours.