You left 20% tip. all you do is divide the tip,0.60, by the total , 3.
I had to answer a question similar to that one on Math XL. This question was about renting a truck instead of needing a 48 mile taxi. (Took me a long time just to find the truck question, but I am giving you the truck help me answer the question, in hopes that it will help you.)
The cost of renting a truck from Hamilton Auto Rental is $47.60 per day plus $0.15 per mile. The expression 47.60 plus 0.15 m represents the cost of renting a truck for one day and driving it m miles. Evaluate 47.60 plus 0.15 m for m equals 120.
Substitute the numerical value for each variable into the expression and simplify the result.
I am sorry if that didn't help you, but it was the closest thing I could find to use to help you.
Answer:
The verticle angle to GOB is AOF.
Step-by-step explanation:
Look at the picture, it's pretty clear
Answer:

Step-by-step explanation:
given 
the factor (x - 3) can be cancelled from the numerator/ denominator leaving
