The cost of the dinner is $45.15.
Given
You have a coupon for 30% off your dinner.
Your total bill was $50.
You also need to pay a 7% sales tax and leave a 22% tip.
After a 30% discount the cost of the bill is;
[tex]= 50 \times \dfrac{30}{100}\\\\= 15[/tex]
The remaining bill is 50 - 15 = $35.
After the discount adds 7% sales tax.
[tex]=35 \times \dfrac{7}{100}\\\\= 35 \times 0.07\\\\= 2.45[/tex]
The bill after sales tax is = 35 + 2.45 = $37.45.
With the discount, tip + tax included, adding 22% tip is;
[tex]=35 \times \dfrac{22}{100}\\\\=35 \times 0.22\\\\= 7.7[/tex]
Therefore,
The cost of dinner is
$35 + $2.45 + $7.7 = $45.15
Hence, the cost of the dinner is $45.15.
To know more about Equation click the link given below.
https://brainly.com/question/12895249
