Answer :
The information is not needed to compute the bill after tax and tip is the cost of tax and the total bill is 21.0.
Given that restaurant customer left three. five as a tip the tax on the meal is 7% and the tip was 20% of the cost including tax.
Let's the bill after tax and tip (or total bill) will be a and the bill after tax will be b
We know that the tip ($3.5) was 20% of the after tax cost (b):
$3.5 = 20% * b
As it is given that the total after tax and tip (a) equals the after tax cost (b) plus the tip:
a = b + $3.5
As we can see that we don't need to know that the tax was 7% of the bill in order to get these equations. That's our answer for the first question.
Now we have to evaluate our second equation to figure out what the total bill (a) is.
a = b + $3.5
Now, we will find the value of b.
So, we can solve the first equation and find the value of b from there:
3.5 = 0.20 * b
Divide both sides by 0.20:
3.5/0.20 = b
Evaluate:
17.5= b
Now we can substitute 17.5 in for b in our other equation:
a=b+3.5
a = 17.5+3.5
a=21.0
So the total bill was 21.0; the answer to our second question.
Hence, when restaurant customer left three. five as a tip the tax on the meal is 7% and the tip was 20% of the cost including tax then he information is not needed to compute the bill after tax and tip is the cost of tax and the total bill is 21.0.
Learn more about the equation word problems from here brainly.com/question/25693822
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