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$15.81
15% of $20 is $3 so subtract that from $20 and u get $17.
Then 7% of $17 is $1.19 so subtract that from $17 and you get $15.81, which is the amount Lin’s father would pay for the meal in the end.
Answer:
Step-by-step explanation:
Use the distance formula between points to find all sides:
AB=
BC=
CA=
This is a 45° 45° 90° triangle, where two of the sides are equal and the other side is the first two sides times 
, so yes, it is a right triangle.
