Factor completely using the grouping method to factor trinomials. If unfactorable, indicate that the polynomial is prime.15x2y2 + 11xy2 - 12y2
A. y2(x + 4)(15x - 3)
B. (5x + 4y)(3x - 3y)
C. (3x + 4y)(5x - 3y)
D. y2(3x + 4)(5x - 3)
Answer: D
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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?Does an hour of meditation per day lower blood pressure?
A. Case-control study B. Experiment with single blinding C. Observational study D. Experiment with double blinding E. Experiment without blinding
Find an equation of variation for the given situation.y varies directly as z, and y = 50 when z = 400.
A. y = -2z
B. y = 
z
C. y = 8z
D. y = - 
z
Use the even-odd properties to find the exact value of the expression. Do not use a calculator.sec (-60°)
A. - 
B. 2
C. 
D. -2
Find fractional notation for the ratio. You need not simplify.At an advertising agency that employs 300 people, 137 employees receive 2 weeks of paid vacation each year. What is the ratio of those who receive 2 weeks of paid vacation to the total number of employees?
A. 
B. 
C. 
D. 