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Zoe paid 
$18.60 in sales tax and tips for her dinner. The sales tax rate is 
11%, and she tipped 
20%. (The sales tax does not apply to the tip, and the tip is based on the price of the dinner before sales tax.)
What was the price of Zoe's dinner, before sales tax and tip?

$

Zoe paid $18.60 \$ 18.60 in sales tax and tips for her dinner. The sales tax rate is 11% 11 \% , and she tipped 20% 20 \% . (The sales tax does not apply to the tip, and the tip is based on the price of the dinner before sales tax.)\newlineWhat was the price of Zoe's dinner, before sales tax and tip?\newline$ \$

Full solution

Q. Zoe paid $18.60 \$ 18.60 in sales tax and tips for her dinner. The sales tax rate is 11% 11 \% , and she tipped 20% 20 \% . (The sales tax does not apply to the tip, and the tip is based on the price of the dinner before sales tax.)\newlineWhat was the price of Zoe's dinner, before sales tax and tip?\newline$ \$
  1. Given Information: We know:\newlineTotal amount paid for sales tax and tips: $18.60\$18.60\newlineSales tax rate: 11%11\%\newlineTip percentage: 20%20\%\newlineWe need to find the price of the dinner before sales tax and tip.\newlineLet's denote the price of the dinner before sales tax and tip as PP.\newlineThe sales tax is 11%11\% of PP, which is 0.11×P0.11 \times P.\newlineThe tip is 20%20\% of PP, which is 0.20×P0.20 \times P.\newlineThe total amount paid for sales tax and tips is the sum of the sales tax and the tip.\newlineSo, 0.11×P+0.20×P0.11 \times P + 0.20 \times P.
  2. Denote Price as PP: Combine the percentages to simplify the equation:\newline0.11P+0.20P=0.31P0.11P + 0.20P = 0.31P\newlineNow we have:\newline0.31P=$(18.60)0.31P = \$(18.60)\newlineTo find PP, we divide $18.60\$18.60 by 0.310.31:\newlineP=$18.600.31P = \frac{\$18.60}{0.31}
  3. Calculate Total Amount: Perform the division to find PP: \newlineP=$18.600.31P = \frac{\$18.60}{0.31}\newlineP=$60P = \$60\newlineSo, the price of Zoe's dinner before sales tax and tip was $60\$60.

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