Simplify.
A. 
B. 
C. 
D. 
Answer: A
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?Which of the following is not true about subtracting integers?
A. ?-(-6) is positive. B. ?If a< b, and both a and b are negative, then a - b is positive. C. ?If a < b and a is negative, and b is positive, then a - b is negative. D. ?If a < b and a is positive, then b is positive. E. ?If a < b and b is positive, then b - a is positive.
Solve the problem."If there is a choice that has a majority of the first-place votes in an election, then that choice should be the winner of the election." This fairness criterion is called the
A. independence of irrelevant alternatives criterion. B. Condorcet criterion. C. monotonicity criterion. D. majority criterion. E. none of these
Solve the problem.The function f(t) = -0.15t2 + 0.49t + 31.7 models a certain country's population in millions, ages 65 and older, where t represents years after 2010. The function g(t) = 0.56t2 + 12.55t + 105.7 models the total yearly cost of the government's health insurance program in billions of dollars, where t represents years after 2010. What does the function 
represent? Find 
(15).
A. Cost per person in thousands of dollars. $79.24 thousand B. Cost per person in thousands of dollars. $0.01 thousand C. Cost per person in thousands of dollars. $0.17 thousand D. Cost per person in thousands of dollars. $7.65 thousand
Evaluate the exponential expression.17
A. 17 B. undefined C. 7 D. 1