Factor completely.15xy + 45x - 3y - 9
A. (3y + 3)(5x - 1)
B. 3(y - 3)(5x + 1)
C. (y + 3)(15x - 3)
D. 3(y + 3)(5x - 1)
Answer: D
Mathematics
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The (r + 1)st term of the expression (a + b)n, 0 ? r ? n, is given by 
an - rbr. Find the specified term.The 5th term of (2x + 3y)10.
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A. x = 23.1 B. x = 9 C. x = 23.6 D. x = 8.5
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Use properties of real numbers to calculate the expression mentally.
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? 7 ? 
A. 
B. 
C. 
D. 
Mathematics