Multiply.(2x - 9y)2
A. 4x2 + 81y2
B. 4x2 - 36xy + 81y2
C. 2x2 - 36xy + 81y2
D. 2x2 + 81y2
Answer: B
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In order to answer the given question, which of the following types of study would be the most appropriate: an experiment without blinding, an experiment with single blinding, an experiment with double blinding, an observational study, or a case-control study?What percentage of the population reads a newspaper on a regular basis?
A. Observational study B. Case-control study C. Experiment without blinding D. Experiment with double blinding E. Experiment with single blinding
Solve the equation for the indicated variable.5r + 1 = 9s for r
A. 
B. 
s - 1
C. 
s + 1
D. 9s - 
Solve the equation.(x - 4)(x + 3) = 0
A. 4, -4, 3, -3 B. 4, 3 C. -4, 3 D. 4, -3
Solve the equation for the unknown variable.log81 = n
A. n = 64 B. n = 8 C. n = 0 D. n = 1