Answer:
<em>B.) M + 7</em>
Explanation:
Since the average (arithmetic mean) of two numbers is equal to the sum of the two numbers divided by 2, the equations X = m+9/
2
, Y = 2m+15/2
, Z = 3m+18
/2 are true. The average of x, y, and z is given by x+y+z
/3
. Substituting the expressions in m for each variable (x, y, z) gives:
[
m+9
/2
+
2m+15/
2
+
3m+18/2
] / 3
This fraction can be simplified to <em>m+7.</em>
One disadvantage of investing in precious metals is that other metals change their values more easily (option C).
<h3>How does the value of metals behave?</h3>
Precious metals such as gold and silver are metals that hardly change their price because they serve as a standard to set the price of other metals.
However, its value is not always the most suitable for making investments. Although they do not lose value over time. Many people prefer to make investments in other metals such as steel or iron because these change their price according to supply and demand.
So in a time of scarcity of these metals, their value will increase dramatically compared to their initial selling price. This phenomenon is not evident in precious metals such as gold.
Note: This question is incomplete because there is some information missing. Here is the complete information:
Options
- None of these.
- All of these.
- NOT precious metals can have their value manipulated more easily.
- Precious metals can have their value manipulated more easily.
Learn more about precious metals in: brainly.com/question/1336406
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