Factor the trinomial completely.
A. 
B. 
C. 
D. 
E. not factorable
Answer: D
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Integrate the function.
dx
A. 2 ln 
- 
+ ln 
+ tan-1
+ C
B. 5 ln 
+ 
- ln 
+ sin-1 
+ C
C. 2 ln 
+ ln 
+ 
tan-1 
+ C
D. 7 ln 
+ ln 
+ 
tan-1 
+ C
Solve the problem.Consider a retirement savings account where the monthly contribution is $100 for the first 15 years, is increased to $225 for the next 15 years, and then is increased once again to $325 for the last 10 years. The APR is always 5.4% compounded monthly. What is the value of the account at the end of 40 years? Round your answer to the nearest cent.
A. $257,880.02 B. $255,975.42 C. $266,356.93 D. $281,406.16 E. $264,452.33
Add.13,327 + 65,777 + 5,215
A. 119,319 B. 82,314 C. 83,319 D. 84,319
Use matrices to solve the system of equations (if possible). Use Gaussian elimination with back-substitution or Gauss-Jordan elimination.
A. x = 4, y = -2 B. x = -4, y = 2 C. x = 2, y = -4 D. x = 2, y = 4 E. no solution