A bank loaned out $57,000, part of it at the rate of 12% per year and the rest at a rate of 4% per year. If the interest received was 8 4680, how much was loaned at 12%?

the answer to the question is a  

it has the same slope and the same y-intercept.

1) 2/5

2) zero=0/1

3) zero=0/2

4) -4/5

5) undefined=3/0

x= cost per bracelet

number of bracelets * x + shipping charge = total cost

so

9x+9=72