Evaluate the expression for the given replacement values. Write the answer in simplest form.x - y for x = 
, y = 
A. 
B. 
C. 
D. 
Answer: A
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Use Gaussian elimination to solve the linear system by finding an equivalent system in triangular form.
A. (-2, 2, -5) B. (-2, -5, 2) C. no solution D. (2, -5, -2)
Solve the system of equations. Determine whether the system is consistent or inconsistent. If the system is consistent, state whether the equations are dependent or independent.3x - 4y = 15-6x + 8y = -40
A. No solutions; inconsistent
B. {(x, y) 
}; consistent; dependent
C. (5, 0); consistent; independent
D. (0, -5); consistent; independent
Find the standard form of the equation of the parabola.Vertex at (-8, 7), opens to the right, focal width = 16
A. (y - 7)2 = 4(x + 8) B. (y - 7)2 = -16(x + 8) C. (x + 8)2 = 16(y - 7) D. (y - 7)2 = 16(x + 8)
Find the derivative of f at the given point.f(x) = x2 + 3x + 16 at x = 7
A. 14 B. 5 C. 3 D. 17