Find the exact value of the expression.cos 
cos 
- sin 
sin 
A. 0
B. 1
C. -1
D. 
Answer: A
Mathematics
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Rotate the figure about the point as indicated.Rotate the figure 270° about point A.
What will be an ideal response?
Mathematics
Use the four-step procedure to solve the variation problem.A person's hair length varies directly as the number of weeks it has been growing. If Fred shaved his head bald and his hair was 0.28 inches long after 7 weeks, how long would it be after an additional 6 weeks? Round to the nearest hundredth of an inch.
A. 1.50 inches B. 0.24 inch C. 3.25 inches D. 0.52 inch
Mathematics
Multiply the expressions.(8x + 5y)(8x - 5y)
A. 8x2 - 5y2 B. 64x2 - 80xy - 25y2 C. 64x2 - 25y2 D. 64x2 + 80xy - 25y2
Mathematics
Rewrite the expression as a sum or difference, then simplify if possible.
?
?
A. 
B. ?
C. ?
D. ?
E. ?
Mathematics