Simplify the expression. Express the answer so that only positive exponents occur. Assume that all variables are positive.(9x12y-4)1/2
A. 
B. 
C. 
D. 3x6y2
Answer: B
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Evaluate the square root. If the root is irrational then approximate the square root to the nearest hundredth.
A. 21.9 B. 2.19 C. 2.18 D. 2.2
Find the solution(s) (if any) of the system of equations by the graphical method. If the equations are dependent, write your answer with x being arbitrary.
A. {(9, 1)}
B. 
C. {(1, 9)}
D. inconsistent
Complete the ordered pairs. Then graph the equation by plotting the points and drawing a line through them.y = -x - 7(0, ), ( , 0), (1, )
A. (0, 7), (7, 0), (1, 6)
B. (0, -7), (7, 0), (1, -6)
C. (0, 7), (-7, 0), (1, 8)
D. (0, -7), (-7, 0), (1, -8)
Use technology to compute r, the correlation coefficient.The following are costs of advertising (in thousands of dollars) and the number of products sold (in thousands): 
A. -.0707 B. .7077 C. .2456 D. .2353