Write the system of linear equations that the augmented matrix represents. Use the variables x, y, and z.
A. x = -7
y = -1
z = 0
B. x = 0
y = 8
z = 9
C. x = 1
y = 7
z = 8
D. x = -1
y = -7
z = -8
Answer: C
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Solve the problem.Two low-frequency sound waves with similar frequencies, producing the pressures 
and 
combine to form a pressure P = P1 + P2 . The variable t is time measured in seconds. Graph P in 
by 
and use the graph to determine the frequency of the displayed beats.
A. 10 beats per second B. 8 beats per second C. 13 beats per second D. 5 beats per second
Find the second derivative of the function.
?
?
A. 
B. ?
C. ?
D. ?
E. ?
For the given function f(x), find f-1(x). State the domain of f-1(x).f(x) = (x + 16)2 - 5 (x ? -16)
A. f-1(x) = 5x2 + 16, x ? 0
B. f-1(x) = 
+ 5, x ? -16
C. f-1(x) = 
- 16, x ? -5
D. f-1(x) = 
+ 16, x ? 5
For the given function, find 
.2x2 + 5
A. 2h
B. 
C. 1
D. 4x + 2h