Solve the problem.The quadratic function 
models the median, or average, age, y, at which U.S. 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.)
A. 1951, 26.4 years old
B. 1951, 47.4 years old
C. 1952, 36 years old
D. 1936, 47.4 years old
Answer: A
Mathematics
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Solve the given differential equation. (The form of yp is given.)D2y + 6Dy + 5y = -5 + ex (Let yp = A + Bex.)
A. y = c1e-5x + c2e-x - 1 + 
ex
B. y = c1e5x + c2ex - 1 + 
ex
C. y = c1e-5x + c2e-x - 1 - 
ex
D. y = c1e-5x + c2e-x + 1 + 
ex
Mathematics
Solve the problem.Find g(a + 1) when g(x) = 
x + 3.
A. 
a - 5
B. 
C. 
a + 3
D. 
Mathematics
Solve the problem.The Wellspring Company's fleet of trucks get 20, 9, 16, 13, 19, 12, and 23 miles per gallon. What is the mean miles per gallon for the fleet? Round to the nearest whole number.
A. 19 B. 17 C. 15 D. 16
Mathematics
Find the difference.
- 
A. 
B. 
C. 
D. - 
Mathematics