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bearhunter [10]
3 years ago
14

X + (-9) + 9 = 8 solve the equation using mental math

Mathematics
1 answer:
Studentka2010 [4]3 years ago
8 0

Answer:

X=8 simplify equation

Step-by-step explanation:

-9+9=0

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6 0
3 years ago
20. The H.M. between 2 and 8 is<br>(1 marks )​
e-lub [12.9K]

Answer as an improper fraction = 16/5

Answer as a mixed number = 3 & 1/5

Answer in decimal form = 3.2

All of those values represent the same thing, but written in a different way.

=============================================================

Explanation:

I'm assuming HM stands for Harmonic Mean in this case.

If so, then we apply the reciprocal operation to each value to get 1/2 and 1/8 (from 2 and 8 respectively).

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-----------

To convert to a mixed number, we can do the following:

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3 years ago
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