To answer this question you will use ratios. The information given gives us a part to part ratio of 1 part vinegar for every 3 parts oil.
Because the total amount of furniture polish is 30 ounces, we will need to write one part vinegar to three parts oil as a part to part to whole ratio.
Use this information then and create an equivalent ratio with a total of 30 ounces. See below.
1 vinegar (x7.5) = 7.5 ounces
3 oil. (X7.5). = 22.5 ounces
4 total (x7.5). = 30 ounces
You will need 7.5 ounces of vinegar and a 22.5 ounces of oil.
Answer:
The answer is C. 10
Step-by-step explanation:
Answer:

Step-by-step explanation:
A pentagon's angle all add up to 540


Let f and s be the ages of the father and the son. We have

From the first equation we derive

Substitute this expression for f in the second equation and we have

The solutions to this equation are s=5 or s=37
Since the sum of the ages must be 42, the solutions would imply

We can only accept the first solution, since the second would imply a son older than his father!