Factor completely. If the polynomial is prime, say so.49x2 - 81
A. Prime
B. (7x + 9)2
C. (7x - 9)2
D. (7x + 9)(7x - 9)
Answer: D
Mathematics
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Solve.The temperature at the South Pole station registered 41°F one day. The following day, it registered -32°F. By how many degrees did the temperature drop?
A. 9°F B. -73°F C. -9°F D. 73°F
Mathematics
Use a sum or difference identity to find the exact value.tan 
A. 2 - 
B. 2 + 
C. -2 + 
D. -2 - 
Mathematics
Express as a sum of logarithms.logr 10T
A. logr 10 + logr T + logr r B. logr 10 + logr T C. log7 r + logT r D. log 10 + log T
Mathematics
Simplify.-
A. -
B. 2
C. 3
D. -3
Mathematics