Identify the number as prime, composite, or unit.198
A. Unit
B. Composite
C. Prime
Answer: B
Mathematics
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Find the sum of the series as a function of x.
A. 
B. - 
C. - 
D. 
Mathematics
Use the identities for the cosine of a sum or a difference to write the expression as a single function of ?.cos (? + 90°)
A. cos ? B. sin ? C. -sin ? D. -cos ?
Mathematics
Plot the point in the xy-plane. Tell in which quadrant or on what axis the point lies.(-1, -3) 
A. 
Quadrant II
B. 
Quadrant IV
C. 
Quadrant III
D. 
Quadrant III
Mathematics
Solve by the substitution method. x + y = 76x + 6y = 42
A. {(0, 0)} B. {(5, 2)} C. {(x, y)| x + y = 7} D. ?
Mathematics