Solve the system of equations. x + y + z = 8 x - y + 5z = 24 5x + 5y + 5z = 12
A. {(5, 1, 2)}
B. {(5, 2, 1)}
C. {(1, 2, 5)}
D. ?
Answer: D
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Given the graph of f, find any values of x at which f ' is not defined.
A. x = 0 B. x = 3 C. x = 0, 3 D. Defined for all values of x
Simplify the expression. If any variables exist, assume that they are positive.2
+ 2
A. 14x
B. 14
C. 2
D. 7
Perform the indicated operation. Don't forget to simplify if possible. Subtract 6x + 3 from 4x - 15
A. 10x - 12 B. -2x + 12 C. 2x + 18 D. -2x - 18
Solve the problem.An arrow is fired straight up from the ground with an initial velocity of 
per second. Its height, 
in feet at any time t is given by the function 
Find the interval of time for which the height of the arrow is greater than 
A. before 
sec
B. before 
sec or after 
sec
C. after 
sec
D. between 
and 
sec