?Which property of determinants is illustrated by the equation 
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A. If two rows of a matrix are interchanged, the determinant of the matrix is multiplied by -1.
B. If two columns of a matrix are interchanged, the determinant of the matrix is multiplied by -1.
C. If a row of a matrix is subtracted from another row of the same matrix, the determinant of the matrix is multiplied by -1.
D. If two matrices have any rows equal, the determinant of the matrix is multiplied by -1.
E. If a column of a matrix is subtracted from another column, the determinant of the matrix is multiplied by -1.
Answer: A
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Determine all values of x at which the function is discontinuous.
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A. 0, 4 B. 0, -4 C. -5 D. 5 E. -4
Graph the linear equation. Give the x- and y-intercepts.x + 4 = 0
A. x-intercept: (0, 0); y-intercept: (0, 0)
B. x-intercept: none; y-intercept: (0, -4)
C. x-intercept: (4, 0); y-intercept: none
D. x-intercept: (-4, 0); y-intercept: none
Find the vertex, focus, and directrix of the parabola.x2 = 8y
A. vertex: (0, 0)
focus: (-2, 0)
directrix: x = 2
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focus: (2, 0)
directrix: x = -2
C. vertex: (0, 0)
focus: (0, 2)
directrix: y = -2
D. vertex: (0, 0)
focus: (0, -2)
directrix: y = 2