Write an equivalent expression. Use an associative law.2 + (s + t)
A. (2 + s) + t
B. 2 + (t + s)
C. (s + t) + 2
D. 2(s + t)
Answer: A
Mathematics
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= 
.
A. 
B. 
C. 
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A. 
+ 
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B. 
- 
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C. 
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