Evaluate. Assume u > 0 when ln u appears. 
A. 
+ 9et + C
B. 2tet2 + 9et + C
C. 2et + 9et + C
D. 
+ 9et + C
Answer: A
Mathematics
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Simplify the expression.
A. 2 B. -2 C. -4 D. 4
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Fourty liters of a 40% acid solution is obtained by mixing a 28% solution with a 50% solution.Write a system of equations in which one equation represents the amount of final mixture required and the other represents the percent of acid in the final mixture. Let x and y represent the amounts of the 28% and 50% solutions, respectively. ?
A. ?
B. ?
C. 
D. ?
E. ?
Mathematics
Name the set using the roster method.The set of even numbers between 3 and 7
A. {4, 5, 6} B. ? C. {3, 4, 5, 6, 7} D. {4, 6}
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Factor.729y3z - z
A. z(9y - 1)(81y2 + 9y + 1) B. z(9y - 1)(81y2 + 1) C. z(9y + 1)(81y2 - 9y + 1) D. z(729y - 1)(y2 + 9y + 1)
Mathematics