I believe it is the second one... I think = is for numbers only.
Answer:
<em>would be the mean.</em>
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Step-by-step explanation:
<em>The mean is when you add up the numbers and then divide it by how many numbers there are. </em>
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To do a two-column proof, you must know the definitions of the terms that are being used. Also, you must know the postulates and theorems you have learned so far. You look at the given information, and using the definitions, postulates, and theorems, you reason in your mind how to go from the given to the conclusion, step by step. You write each step and the accompanying reason that allows you to conclude each step.
I didn't get the question whether it was 42 or 4×2
63.3% decrease
49 - 18 = 31
31/49 = 0.63265 x 100
= 63.3 rounded to the nearest tenth of a percent
