Represent the following with a graph.
A. 
B. 
C. 
D. 
Answer: B
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Use Gaussian elimination and matrices to solve the system of linear equations. Write your final augmented matrix in triangular form and then solve for each variable using back substitution.x - y + 4z=164x + z= 5x + 5y + z=25
A. (0, 4, 5) B. (5, 4, 0) C. (0, 5, 4) D. (5, 0, 4)
Graph the ellipse. Label the intercepts.x2 + 4y2 = 64
A. (-4, 0), (4, 0), (0, -8), (0, 8)
B. (-8, 0), (8, 0), (0, -2), (0, 2)
C. (-8, 0), (8, 0), (0, -4), (0, 4)
D. (-2, 0), (2, 0), (0, -8), (0, 8)
A solar oven uses a parabolic reflector to focus the sun's rays at a point 5 inches from the vertex of the reflector (see figure). Write an equation for a cross section of the oven's reflector with its focus on the positive y axis and its vertex at the origin.
L = 5 inches
A. 
B. 
C. 
D. 
E. ?
Supply the missing numbers. Round any decimal to the nearest thousandth and percent to the nearest tenth of a percent if necessary.fractiondecimalpercent
A. 0.938; 938% B. 0.938; 93.8% C. 0.818; 8.18% D. 0.818; 81.8%