What’s the cost before the tip? We need to know that before calculating the cost with the tip.
The value of T is
OR 
Step-by-step explanation:
Assumption: find the values of t
1. Equation is
+20t+65
2. Identify values of a, b and c
3. Write the quadratic formula
t = 
4. Substitute the values of a, b and c in the formula
t = 
t = 
5. Solve to find the possible values of t
t = 
OR
Keywords: Quadratic
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They are the same because the distance formula depends on a right triangle relationship between x and y, where as the right triangle has the same relationship with x being one leg of the right triangle and y the other leg of the right triangle