Solve the system by the addition method. 2x + 10y = -5610x + 2y = 56
A. {(-7, 7)}
B. {(-2, 7)}
C. {(7, -7)}
D. {(10, -10)}
Answer: C
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Solve the problem.The average waiting time in a line before getting served is given by ?W = 
where A is the average rate that people arrive at the line and S is the average service time. At a certain bank, the average service time is 4 minutes. By sketching a graph of the equation on the interval 
answer the following questions. What happens to W when A is close to zero? Why does this make sense? What feature of your graph gives this information?
What will be an ideal response?
Find the sum or difference. Write the answer in standard form.6i + (-5 - i)
A. -5 + 5i B. 5 - 5i C. -5 + 7i D. 5 - 7i
Solve the equation on the interval [0, 2?).cos2 x - cos x = 0
A. 0, 
, 
B. 0, 
, ?, 
C. 
, 
D. 
, ?
Perform the indicated operation. Simplify if possible.
÷ 
A. 
B. 1
C. 22
D. 