Determine whether the given expression is a polynomial. If it is, write it in standard form.2x-1 - 5 + 4x
A. Yes; 4x + 2x-1 - 5
B. No
Answer: B
Mathematics
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Find a formula for the nth term of the sequence.1, - 
, 
, - 
, 
(reciprocals of squares with alternating signs)
A. an = 
B. an = 
C. an = 
D. an = 
Mathematics
Solve the proportion. Write the solution in decimal form when applicable.
= 
A. 5.5 B. 2.1 C. 5.6 D. 2.6
Mathematics
Use Cramer's rule to solve the system.0.3x + 0.08y = 122x - y = -100
A. ? B. {(300, 400)} C. {(400, 300)} D. {(3, 4)}
Mathematics
Identify the radicand and index of the expression.5ab 
A. 
; 3
B. b2; 2
C. b2 - 2; 3
D. 5ab; 2
Mathematics