Perform the indicated operations and simplify the result. Leave the answer in factored form.
- 
A. 
B. 0
C. 
D. 
Answer: C
Mathematics
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Solve the system by the substitution method. If there is no solution or an infinite number of solutions, so state. Use set notation to express the solution set.
A. {(-1, 0)} B. no solution; ? C. {(-1, 1)} D. {(-2, 1)}
Mathematics
Write as a common fraction.9.27
A. 
B. 
C. 
D. 
Mathematics
Add or subtract. Simplify the answer.
- 
A. 
B. 
C. 
D. 
Mathematics
Find the angle between v and w. Round your answer to one decimal place, if necessary.v = -6i,
w = j
A. 270° B. 180° C. 0° D. 90°
Mathematics