-2-(+7) is the same thing at -2-7 which is -9

is the same thing as

which is

or

Last but not least the last one is the Associative Property based on definition listed below :)
Associative Property:<span> When three or more numbers are added, the sum is the same regardless of the grouping of the addends. For example (2 + 3) + 4 = 2 + (3 + 4)</span>
Move all terms not containing X to the right side of the inequality
Answer: X < -1
Hope this helps! :)
~Zane
N=1.2 I don't know what you are asking in the second part of the question
Answer:
0.7
Step-by-step explanation:
This one is simply pretty easy. the 7 in this is in the tenths place, and the 1 in this is in the hundredths place
Answer:
B
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