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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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