Explanation:
1) -9 = 9 true/false
the answer is false because negative and positive quite unlike in terms.
2) -(-21) = -21
Using the symbols multiplication rule,
Where,
Therefore, -(-21) = +21 = 21
⟼ 21 = -21
|-9| = |9|
The absolute value (the distance from 0) of -9 and 9:
This is true.
-(-21) = -21
Given:
Negative times a negative is a positive:
21 ≠ -21
This is not true.
To help you answer the last one about P on the number line, we will need more context.
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