Use the graph to solve the problem. The graph shows the relationship between the area A of a rectangle and the length L, if the width is fixed. Find the area if the length is 19 cm.
A. 176 cm2
B. 231 cm2
C. 187 cm2
D. 209 cm2
Answer: D
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Solve the system of equations by Gaussian elimination.
A. {(3, -1, -3)} B. {(-3, 3, -1)} C. {(3, -3, -1)} D. ?
Solve the equation.0.3x - 0.3 = 0.2x + 0.6
A. 9 B. 0.3 C. 3 D. 0.9
Find all relative extrema for the function, and then match the equation to its graph.
z = -x4 + y4 + 2x2 - 2y2 + 
A. Relative maxima of 
at (1, 1) and
at (-1, -1); saddle point at (0, 0)
B. Relative minima of - 
at (0, 1) and
at (0, -1); saddle point at (0, 0)
C. Saddle points at (0, 0), (-1, 1), (1, -1), (1, 1),
and (-1, -1)
D. Relative maxima of 
at (-1, 1) and
at (1, 1)
Use Euler's method to approximate the indicated function value to three decimal places using 
= x2; y(0) = 2; find y(0.4)
A. 2.014 B. 2.020 C. 2.026 D. 2.005