Answer:
and 
Step-by-step explanation:
when you solve for r in the given equation, you need to apply the square root property, which gives positive and negative answers (both should therefore be considered):

then you need to include these two possible solutions:
and 
Answer:
-18
Step-by-step explanation:
Simplify: |3 – 10| – (12 / 4 + 2)^2

Hope this helps!
Answer:
2 and 3
Step-by-step explanation:
-6,-7, and -8, this is more of a guess and check question
The 4 in 42,672 is 40,000
And the 4 in 37,426 is 400
The answer is 100