Find the exact value of the given expression using a sum or difference formula.
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Multiply.( y + 7 )( y - 7)
A. y2 - 14y - 49 B. y2 + 49 C. y2 - 49 D. y2 + 14y + 49
Mathematics
Solve the logarithmic equation. Be sure to reject any value that is not in the domain of the original logarithmic expressions. Give the exact answer.log4 x + log4 (x - 15) = 2
A. {4} B. {1, -16} C. {-1, 16} D. {16}
Mathematics
Use the unit circle to find the indicated quantities.
tan (-7?); sin (-7?)
A. Undefined; -1 B. -1; -1 C. 0; 0 D. Undefined; 0
Mathematics
Multiply.-10xy7(5xy7 + 2y3 + 5)
A. -50x2y14 - 20xy10 B. -50x2y14 + 2y3 + 5 C. -50xy7 - 20y3 - 50 D. -50x2y14 - 20xy10 - 50xy7
Mathematics