Perform the indicated operation and simplify.
+ 
A. 
B. 
C. 
D. 1
Answer: C
Mathematics
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Write the vector in the form 
A. 
B. 
C. 
D. 
Mathematics
Perform the indicated operation.(8a8)(7a4)
A. 1532 B. 56a12 C. 56a32 D. 1512
Mathematics
Solve the problem.From a point on a straight road, John and Fred ride bicycles in opposite directions. John rides 7 miles per hour and Fred rides 10 miles per hour. In how many hours will they be 68 miles apart?
A. 5 hr B. 3 hr C. 4 hr D. Not enough information
Mathematics
Use the fundamental identities to simplify the expression.cos (-x) cos x - sin (-x) sin x
A. 2 B. 1 C. 0 D. cos2x sin2x
Mathematics