1. ## Money problems

http://img230.imageshack.us/img230/4372/mathyv1.jpg
Thanks

2. Originally Posted by dgolverk
http://img230.imageshack.us/img230/4372/mathyv1.jpg
Thanks

RonL

here are the questions:
1)You are starting a business that sells air filters for homes. Your startup costs for the business are $1250 and each air filter kit costs$40.
If you sell the filters for $60, how many must you sell to break even? 2)If you buy 7 hmaburgers and 3 slices of pizza from Sizzler, you get$1 change from $20 bill. If you buy 8 hamburgers and 2 slices of pizza, you get$0.50 back from a $20 bill. How much change would you get from a$20 bill if you bought 3 slices of pizza and 5 hamburgers?

Thanks again!

4. Originally Posted by dgolverk
here are the questions:
1)You are starting a business that sells air filters for homes. Your startup costs for the business are $1250 and each air filter kit costs$40.
If you sell the filters for $60, how many must you sell to break even? I will use "substitution" since I believe that's what your teacher wants... The amount of money you pay equals$1250 plus $40 per filter. y=the amount of money x=filters Thus you have equation: y=40x+1250 The amount of money you make is equal to$60 per filter: y=60x

To braek even, the amount of money you make must equal the amount of money you spent, thus: 40x+1250=60x

now subtract both sides by 40x: 1250=20x

Now divide both sides by 20: 62.5=x

So you need to sell 62.5 filters to break even, which you can't do, so you sell 30 filters to break even.

2)If you buy 7 hmaburgers and 3 slices of pizza from Sizzler, you get $1 change from$20 bill.
7h+3p=19
Solve for p to get: p=(19-7h)/3
If you buy 8 hamburgers and 2 slices of pizza, you get $0.50 back from a$20 bill.
8h+2p=19.5

Solve for p to get: p=(19.5-8h)/2

Substitute: (19-7h)/3=(19.5-8h)/2

solve for h, then substitute that value into one of the equations to find the price of hamburgers, than subtract the price of 3 slices of pizza and 5 hamburgers from 20.

5. Thanks!