"Correlation does not imply causation<span>" is a phrase used in </span>statistics<span> to emphasize that a </span>correlation<span> between two variables does not imply that one </span>causes the other. Correlation is the relationship between two sets of variables used to describe or predict information. Causation<span>, also known as cause and effect, is when an observed event or action appears to have caused a second event or action.
Hope this helps. :)</span>
You didn't give us enough informations to answer that?
Answer:
of oil are needed for each cup of vinegar.
Step-by-step explanation:
Given:
A recipe of salad dressing calls for ¼ cup vinegar to ⅔ cup oil.
Now, to find the cups of oil are needed for each cup of vinegar.
So, we solve by using unitary method:
If 
cup of vinegar is needed for oil of 
cup.
So, 1 cup of vinegar is needed for oil of = 
= 
(the fractions turns reciprocals as the division changes into multiplication)
= 
= 
cups.
Therefore, of oil are needed for each cup of vinegar.
7^2 - 3(4-2)^0 - 2(7+3) + 3^2
= 49 - 3 - 20 + 9
= 35
hope it helps
P.S
any number to the 0 power is always equal 1
