Use the given matrices to compute the given expression.Let C = 
. Find 1/2 C.
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Simplify the expression.cos(x + ?) cos(? - x) + sin(x + ?) sin(? - x)
A. 1 B. cos(2x + 2?) C. 0 D. sin(2x + 2?)
Mathematics
Solve the problem.An engine cylinder 15.6 cm deep is being bored such that the radius increases by 
How fast is the volume V of the cylinder changing when the diameter is 
A. 72 cm3/min B. 7.2 cm3/min C. 480 cm3/min D. 17.7 cm3/min
Mathematics
Use exponential notation to write the repeated multiplication.9 ? 5 ? 5 ? 5 ? 5 ? 5
A. (9 ? 5)5 B. 19 ? 55 C. 455 D. 9 ? 55
Mathematics
Divide and reduce to lowest terms.
÷ 
A. 
B. 
C. 
D. 
Mathematics