Name the property illustrated by the sentence.7 + (a + b) = (7 + a) + b
A. Additive identity property
B. Commutative property of addition
C. Additive inverse property
D. Associative property of addition
Answer: D
Mathematics
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A. 
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D. 
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Find the exact value under the given conditions.sin ? = 
, 0 < ? < 
; cos ? = 
, 0 < ? < 
Find cos (? + ?).
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B. 
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D. - 
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