Let 
= 
and 
/> = 
, and evaluate the expression.
A. 
B. 
C. 
D. 
E. 
Answer: D
Mathematics
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Solve the system of equations. x - y + 2z = 25x + z = 0 x + 5y + z = -10
A. {(0, -2, 2)} B. ? C. {(0, 0, -2)} D. {(0, -2, 0)}
Mathematics
Match the equation to its graph.y = -6
A. 
B. 
C. 
D. 
Mathematics
Write a formula for the nth term of the arithmetic sequence. Use the formula to find the 20th term of the sequence.a = - 
, d = - 
A. an = - 
n - 
; a20 = - 
B. an = - 
n + 
; a20 = - 46
C. an = - 
n - 
; a20 = - 
D. an = - 
n - 
; a20 = - 34
Mathematics
Simplify the expression.
A. 16 B. -4 C. -16 D. 4
Mathematics