The width of a rectangle is W. The length is 4 in less than twice the width. Write a simplified expression that represents the area of this rectangle.
A. 
B. 
C. 
D. none of these
Answer: A
Mathematics
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Find the quadratic approximation of f at x = 0.f(x) = ln(cos 2x)
A. p2(x) = 1 + 2x2 B. p2(x) = 1 - 2x2 C. p2(x) = - 2x2 D. p2(x) = 2x2
Mathematics
Determine the order of the matrix.
A. 4 × 1 B. 1 C. 1 × 4 D. 4
Mathematics
Solve the system of equations by Gauss-Jordan elimination.
A. {(0, -4, 0)} B. {(0, -4, 4)} C. {(0, 0, -4)} D. ?
Mathematics
Evaluate the integral by making the given substitution.
Mathematics