Answer:
Lin's father pay for the meal is $18.19.
Step-by-step explanation:
Given:
Lin’s father is paying for a $20 meal.
He has a 15%-off coupon for the meal.
After the discount, a 7% sales tax is applied.
Now, to get the amount Lin's father pay for meal.
So, we deduct the 15% discount first:
$20 - 15% of $20.
[tex]=20-\frac{15}{100}\times 20[/tex]
[tex]=20-0.15\times 20[/tex]
[tex]=20-3[/tex]
[tex]=\$17.[/tex]
Then, adding 7% sales tax:
$17 + 7% of $17
[tex]=17+\frac{7}{100}\times 17[/tex]
[tex]=17+0.07\times 17[/tex]
[tex]=17+1.19[/tex]
[tex]=\$18.19[/tex]
Therefore, Lin's father pay for the meal is $18.19.
