Answer:
Step-by-step explanation:
Answer:
53. ±6
51. 2
Step-by-step explanation:
According to the Order of Operations [GEMS\BOMDAS\PEMDAS etc.], in this case, evaluate everything in grouping symbols first, then evaluate the exponents to avoid confusion:

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The Absolute Value of -4 is 4.
Yes, it is a doubles fact because it has idk...
The Mid-Atlantic Ridge. It's under the Pacific. Hope this helps!