Find the least common denominator (LCD).
, 
, 
A. 3(r + 9)
B. r(r + 9)2
C. 3(r + 9)2
D. 3r(r + 9)2
Answer: D
Mathematics
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Graph the solution set to the given system of inequalities.x ? 0, y ? 0x + y ? 5
A. 
B. 
C. 
D. 
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Solve the problem.How many liters (L) of a 10% silver iodide solution must be mixed with 8 L of a 4% silver iodide solution to get a 6% solution?
A. 8 L B. 3 L C. 4 L D. 5 L
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Rewrite the expression without absolute value bars.-|-11|
A. 11
B. - 
C. -11
D. 22
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Factor the polynomial.21(3p - 6)2 - 10(3p - 6) + 1
A. (21p + 43)(9p - 18) B. (20p - 43)(2p - 19) C. (21p - 43)(9p - 19) D. (21p - 55)(8p - 19)
Mathematics