Solve the problem.Suppose 8 candidates a, b, c, d, e, f, g, h are involved in a Pairwise Comparison Method election. The number of pairwise comparisons each candidate wins is shown in the table. 
How many comparisons does candidate c win?
A. 8
B. 6
C. 7
D. 9
Answer: A
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Grant receives $252 annual income from one investment. Jeff invested $3400 more than Grant, but at an annual rate of 1% less. Jeff's annual income is $496. Find the amount and rate of Grant's investment. ? Please enter your answer as two numbers in dollars and in percents without the units. The numbers must be separated by a comma.
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Solve the problem.The period, P, of a pendulum in seconds is given by the formula 
where L is the length of the pendulum. Find P when the value of L is 7 inches. Round your answer to the nearest hundredth. Use 3.14 for ?.
A. 2.47 seconds B. 2.94 seconds C. 1.47 seconds D. 3.94 seconds
Write the system of linear equations as a matrix equation.
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Solve the problem.Find k if x = 1 is a solution of the equation kx2 + x + 9 = 0.
A. k = 8 B. k = -10 C. k = -8 D. k = 10