For this case we must simplify the following expression:

We solve the parenthesis:

We apply distributive property to the terms within parentheses:

We add similar terms:

Answer:

Answer:
Oil: 10.5 oz Vinegar: 3.5 oz
Step-by-step explanation:
If the amount of vinegar is the variable x than the amount of oil is 3x. this means that x+3x=14 or 4x=14. Which means x=3.5 so vinegar is 3.5 while oil is three times that or 10.5.
The total amount would be 13/20 I believe I'm not too sure
Yes the quotient of 9 is rational