Multiply. Simplify and leave the numerator and denominator in your answer in factored form.
? 
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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Add or subtract as indicated. You will need to simplify terms to identify like radicals.
+ 
A. 5
B. 4 + 
C. 6
D. 10
Mathematics
Evaluate the following expression using a unit circle.sin 
A. 
B. - 
C. - 
D. Undefined
Mathematics
Solve the system by graphing. If there is no solution or an infinite number of solutions, so state. Use set notation to express the solution set.
A. {(-1, -2)} B. no solution; ? C. {(-2, -1)} D. {(1, 2)}
Mathematics
Use the summation properties to evaluate the series. The following rules may be needed: 
.
A. 112 B. 441 C. 1764 D. 462
Mathematics