Encode or decode the given message, as requested, numbering the letters of the alphabet 1 through 26 in their usual order.Use the coding matrix A = 
and its inverse A-1 = 
to decode the cryptogram 
.
A. GOOD_LUCK
B. LOOK_DOWN
C. HELP_THEM
D. STAY_CALM
Answer: A
Mathematics
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Use integration by parts to establish a reduction formula for the integral.
, n ? 1
A. 
= 
tann-1 x + 
B. 
= tann-1 x - 
C. 
= 
tann-2 x - 
D. 
= 
tann-1 x - 
Mathematics
Find the inverse, if it exists, for the matrix.
A. 
B. 
C. 
D. 
Mathematics
Add or subtract, as indicated. Assume that all variables represent positive real numbers.
- 11
A. 12
B. -10
C. 10
D. -10
Mathematics
Solve the quadratic equation by completing the square.x2 - 5x - 5 = 0
A. 5 ± 3
B. 
C. 
D. 
Mathematics