Use order of operations.
-23-20-(-17)+(-5)x(-2)+4x5
Do all multiplication steps.
-23-20-(-17)+10+20
Do all addition and subtraction steps fro left to right.
-43-(-17)+10+20
-26+10+20
-16+20
answer: 4
fifty five hundredths is equal to 0.55
This is a combination problem.
6 nCr 2

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Answer: 4 I think . not sure
Step-by-step explanation:
Answer:
I'm not lol
Step-by-step explanation: