9th grade Algebra
posted by Tim .
what is the inverse function of g(x)= 3x+2?

y=3x+2
x=y/3 2/3
inverse of g(x)=x/3 2/3 
A health food store mixes granola that costs them $2 per pound and raisins that cost them $ 4 per pound together to make 25 pounds of raisin granola. How many ponds of raisins should they include if they want the mixture to cost them a total of $80?
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