Simplify.
(20a)
A. 5a
B. 4a
C. 80a
D. 20a
Answer: A
Mathematics
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A. -1
B. undefined
C. 1 + 
D. 
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A. 4300 g B. 0.43 g C. 0.043 g D. 43,000 g
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Add.7 + (-8) + (-9)
A. 8 B. 24 C. -10 D. 6
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Factor the polynomial using the negative of the greatest common factor.-35a2b3 + 21ab
A. -7a(5ab3 - 3b) B. 7ab(-5ab2 + 3) C. -7ab(5ab2 + 3) D. -7ab(5ab2 - 3)
Mathematics