Use the graph to complete the identity.cos 2x cos 5x + sin 2x sin 5x = ?
A. y = sin 3x
B. y = sin 7x
C. y = cos 3x
D. y = cos 7x
Answer: C
Mathematics
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A. 
B. 
C. 
D. 
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A. 
B. 
C. 
D. 
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Translate to an equation and solve. What percent of 741 is 942?Round your answer to the nearest tenth of a percent.
A. 0.1% B. 78.7% C. 1.3% D. 127.1%
Mathematics
Solve.It costs a publishing company $15,000 a day to operate two buildings. Building A accounts for 30% of the cost and Building B for the rest of the cost. What percent of the cost does it take to run Building B?
A. 60% B. 70% C. 43% D. 58%
Mathematics