If a bill cost $125. And they leave a $21.25 for a tip what percentage did they tip
1 answer:
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First we have to find 
from the equation 
where a, b and c are consecutive coefficients of the equation. In this case: 
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Later we will need to use
sofor us 
. It can be then simplified to 
.
Then we use quadratic formula
to see what are the options for x.
The answer for your question:
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or 
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Later we will need to use
Then we use quadratic formula
The answer for your question:
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