Evaluate: 
A. 5060
B. 24
C. 266
D. 276
E. None of these
Answer: D
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Secret messages can be encoded by using a code and an encoding matrix. If we have the code:
and an encoding matrix E, we can encode a message by taking every two letters of the message, converting them to their corresponding numbers, creating a 2 × 1 matrix, and then multiplying each two numbers by E. The message may be unscrambled with a decoding matrix which is the inverse of the coding matrix, E-1. Determine if the given pair of encoding matrices are inverses of each
other.
and 
What will be an ideal response?
Use the multiplication property of equality to solve the equation.
= -11
A. 55 B. -55 C. 16 D. -16
Find the LCD of the given rational expressions.
; 
A. q(q - 1) B. -q(q - 1) C. -q2 - 1 D. -q(q + 1)
Solve.?6x - 9? ? 8
A. x ? 
or x ? 
B. x ? 
C. 
? x ? 
D. x ? - 
or x ? 8