Step-by-step 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,
<h2>
+ × + = +</h2><h2>
- × - = +</h2><h2>
- × + = -</h2><h2>
+ × - = -</h2>
Therefore, -(-21) = +21 = 21
⟼ 21 = -21 
I'm not sure what you're asking but if you're looking for simplification, here it is. -7x² + 2x - 12
Answer:
141,161
Step-by-step explanation:
Answer:
Range: 75 Median: 58 1Q: 40 3Q: 75 Interquartile: 35