Why couldn’t the elephants swim puzzle
2 answers:
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Answer:
C)
Step-by-step explanation:
Given Equations:
A)
B)
In order to eliminate we need to multiply
to equation B and add it to A.
Multiplying to B.
⇒
⇒
⇒
Adding it equation A.
+
We get
Thus is eliminated.
So, the expression used to eliminate is:
For this case we must find an expression equivalent to:
To express in scientific notation we must take into account that the power will be positive, that is, the decimal is run to the right.
We test each option.
Option A:
If we run the decimal 9 spaces to the left we have:
Option B:
We discard it because the exponent is negative.
Option C:
We run the decimal 6 spaces to the right
Option D:
We run the decimal 9 spaces to the right
Answer:
Option D