Question 912189
"For each day on the newpaper route you recieve $10.00 plus a fixed amount for each newspaper you deliver."


So you earn 10 + k*x dollars where k is the fixed number you earn per paper and x is the number of papers.


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"Currently you are earning $18.00 per day for delivering 80 newspapers. "


which means 10+k*x = 10+k*80 = 10+80k is the amount of money made. That amount of money made is $18, so 


10+80k = 18


80k = 18-10


80k = 8


k = 8/80


k = 1/10


k = 0.10


So you earn $0.10 or 10 cents per paper.


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Now you are delivering 20 additional papers. So the total delivered is 80+20 = 100 papers


10+k*x = 10+0.10*100 = 10+10 = 20


The final answer is <font color="red">$20.00</font>