Solve the equation by completing the square.5x2 - 2x - 1 = 0
A. 
B. 
C. 
D. 
Answer: A
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250 students in a math class take the final exam. The scores on the exam have an approximately normal distribution with mean ? = 75 and standard deviation ? = 10.Approximately what percentage of the test scores had standardized values between -3 and 3?
A. 95% B. 68% C. 99.7% D. 50% E. none of these
Solve the problem.At age 50, Ann must choose between taking $18,000 at age 60 if she is alive then, or $31,000 at age 70 if she is alive then. The probability for a person aged 50 living to be 60 and 70 is 0.85 and 0.55, respectively. Using expected value, what is Ann's best option?
A. $31,000 at age 70 B. $18,000 at age 60
Determine whether the equation defines y as a function of x.xy = 6
A. Yes B. No
Simplify the decimal expression.18.900 - 7.910
A. 11.090 B. 26.810 C. 10.990 D. 10.890