If central angle ? cuts off a chord of length c in a circle of radius r, then the relationship between ?, c, and r is given by
?
?
?
Find ?, if ?c? = ?r?
.
?
A. ?? = 120°
B. ?? = 90°
C. ?? = 90°
D. ?? = 120°
E. ?? = 120°
Answer: A
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A. 
B. 
C. 
D. 
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Simplify. Assume that all variables represent positive numbers.
A. 5
x + 
B. (50x + 5)2
C. 5
D. 5(10x + 1)
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What will be an ideal response?