Solve. Check for extraneous solutions.x = 
+ 7
A. {3, 12}
B. {-9}
C. {12}
D. {3}
Answer: C
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Find the particular solution to the given differential equation that satisfies the given conditions.y''+ 5y' - 14y = 0; y' = 0 and y = 1 when x = 0
A. y = 
e-7x + 
e2x
B. y = - 
e-7x + 
e2x
C. y = - 
e-7x - 
e2x
D. y = 
e-7x - 
e2x
Use the REGRESSION feature on a graphing calculator.For some reason the quality of production decreased as the year progressed at a flash drive manufacturing plant. The following data represent the percentage of defective flash drives produced at the plant in the corresponding month of the year.
Use the regression equation with values rounded to four decimals to predict the percentage of defective drives in month 6, June.
A. 2.3% B. 2.15% C. 2.20% D. 2.0%
Solve the problem.For the equation y = - 
cos(2x - 2?), identify (i) the amplitude, (ii) the phase shift, and (iii) the period.
A.
(i)  | (ii)  | (iii) ? |
B.
(i)  | (ii) ? | (iii) ? |
C.
| (i) 2 | (ii) ? | (iii) ? |
D.
| (i) 2 | (ii) 2? | (iii) 2? |
Add or subtract.
- 
A. 1
B. - 
C. - 
D. 