Find the exact value using a double-angle identity.sin(180°)
A. - 
B. -1
C. 0
D. 1
Answer: C
Mathematics
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Solve the problem.A store manager paid $45 for an item and set the selling price at $55.80. What was the percent markup?
A. 24% B. 22% C. 19% D. 23%
Mathematics
If possible, simplify the expression. If any variables exist, assume that they are positive.20
- 3
A. 11
B. -11
C. 17
D. Not possible
Mathematics
Perform the indicated operations and simplify the result. Leave the answer in factored form.
A. 
B. 
C. x + 4
D. 
Mathematics
Solve by completing the square.x2 + 4x - 9 = 0
A. {-2 ± 2
}
B. {2 ± 
}
C. {-2 ± 
}
D. {-1 ± 
}
Mathematics