Evaluate the sum.
?
?
A. 
B. 
C. 
D. 
E. 45
Answer: A
Mathematics
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A. Expression B. Equation
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Solve the problem.In one U.S. city, the quadratic function 
models the median, or average, age, y, at which men were first married x years after 1900. In which year was this average age at a minimum? (Round to the nearest year.) What was the average age at first marriage for that year? (Round to the nearest tenth.)
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Mathematics