Graph the function by starting with the graph of the basic function and then using the techniques of shifting, compressing, stretching, and/or reflecting.f(x) = (-x)2 
A. 
B. 
C. 
D. 
Answer: A
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Perform the indicated operations and simplify.
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+ 
A. 
B. 
C. - 
D. - 
Solve the system of equations using matrices. Use Gaussian elimination with back-substitution. 5x - y + 7z= 77 2x + 8z= 64 7y + z= 41
A. {(8, 5, 6)} B. {(-8, 5, 16)} C. {(8, 6, 5)} D. {(-8, 16, 5)}
Solve the problem.The time between major earthquakes in a particular region of the Mediterranean is a random variable with probability density function f(x) = 
e-x/1700 for x in [0, ?), where t is measured in days. Find the expected value and the standard deviation of this probability density function.
A. ? = 1700 days; ? = 1700 days B. ? = 1700 days; ? = 2403.8 days C. ? = 1700 days; ? = 3400 days D. ? = 3400 days; ? = 2403.8 days
Graph the function.y = -2x - 5
A. 
B. 
C. 
D. 