Use the substitution method to solve the system. x + 6y = -6-2x + 7y = 12
A. (6, -1)
B. (-6, 0)
C. (-5, -6)
D. No solution
Answer: B
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Write the following fraction as a terminating decimal or, if a repeating decimal, rounded to the thousandths place.
A. 0.525 B. 0.585 C. 0.625 D. 0.635
Solve the problem.Cindy will require $10,000 in 3 years to return to college to get an MBA degree. How much money should she ask her parents for now so that, if she invests it at 
compounded continuously, she will have enough for school? (Round your answer to the nearest dollar.)
A. $7312 B. $7189 C. $5169 D. $13,910
Simplify the exponential expression.
A. x3y3 B. 7x2y2 C. 7x2y3 D. 7x3y3
Solve the problem.Suppose the supply function of a certain item is given by 
and the demand function is given by 
Find the producers' surplus. Round your answer to three decimal places.
A. 1.228 B. 1.337 C. 0.664 D. 0.773