Use matrices to solve the system of equations. If the system has no solution, so indicate .
A. ( 7, 5 )
B. ( 4, 2 )
C. ( 7, 2 )
D. ( 4, 5 )
E. No solution.
Answer: D
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Determine if the given polar coordinates represent the same point.(3, ?/2), (-3, 3?/2)
A. No B. Yes
Find a quadratic function that best fits the data. Give answers to the nearest hundredth.
A. y = 5.66x2 - 39.888x + 99.29 B. y = 1.40x2 + 27.15x + 14.44 C. y = -0.03 + 3.78x - 6.74 D. y = -1.40x2 + 27.15x - 14.44
Rationalize the denominator and simplify. Assume that all variables represent positive real numbers.
A. 
B. 
C. 
D. 
Graph the quadratic function. Determine the vertex, find the equation of the axis of symmetry, find any x- and y-intercepts, and state the domain and range in interval notation.f(x) = -x2 - 8x
A. vertex: (-4, 16)
axis of symmetry: x = -4
x-intercepts: 0 and -8; y-intercept: 0
domain: (-?, ?); range: (-?, 16]
B. vertex: (4, -16)
axis of symmetry: x = 4
x-intercept: none; y-intercept: -32
domain: (-?, ?); range: (-?, -16]
C. vertex: (-4, -16)
axis of symmetry: x = -4
x-intercept: none; y-intercept: -32
domain: (-?, ?); range: (-?, -16]
D. vertex: (4, 16)
axis of symmetry: x = 4
x-intercepts: 0 and 8; y-intercept: 0
domain: (-?, ?); range: (-?, 16]