Select the graph of the equation.
?
?
A. ?
B. ?
C. ?
D. ?
E. ?
Answer: C
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Simplify using rational exponents.
A. 3a5b2
B. 3a4b2
C. 3a4b6
D. 3a4b3
Determine the least-square error when the line y = 2x + 2.5 is used to approximate the data points 
and (6, 15).
Fill in the blank(s) with the appropriate word(s).
Solve the problem.An audio speaker that weighs 50 pounds hangs from the ceiling of a restaurant from two cables as shown in the figure. To two decimal places, what is the tension in the two cables? 
A. Tension in right cable: 35.90 lb; tension in left cable: 41.59 lb B. Tension in right cable: 41.59 lb; tension in left cable: 35.90 lb C. Tension in right cable: 35.90 lb; tension in left cable: 14.10 lb D. Tension in right cable: 14.10 lb; tension in left cable: 41.59 lb
Solve the system. w + 3x - 2y - z = -4 4w + x + y + 2z = 15-3w - x - 3y - 2z = -18 w - x - 3y - 2z = -14
A. {(1 + z, 1 - 2z, 2 + 2z, z)} B. {(-4, 15, -18, -14)} C. {(1, 1, 2, 4)} D. {(0, 3, -2, 6)}