Solve the system using the inverse of the coefficient matrix of the equivalent matrix equation. x + 3y = -8-14x - 4y = -2
A. (-3, 1)
B. (-1, 3)
C. (3, -1)
D. (1, -3)
Answer: D
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Solve the system of equations.5x + 2y + z = -112x - 3y - z = 177x + y + 2z = -4
A. (-3, 0, 4) B. (0, -6, 1) C. (3, 0, -4) D. (0, 6, -1)
The flow of blood through an arteriole in cubic centimeters per second is given by
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where l is the length (in cm) of the arteriole, r is its radius (in cm), p is the difference in pressure between the two ends of the arteriole (in dyne/cm2), and k is the viscosity of blood (in dyne-sec/cm2). Find the approximate percentage change in the flow of blood if an error of 4% is made in measuring the length of the arteriole and an error of 3% is made in measuring its radius. Assume that p and k are constant.
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A. 
B. ?
C. ?
D. ?
E. ?
Solve the problem.Find the number of units, x, that produces the maximum profit P, if C(x) = 70 + 8x and
A. 32 units B. 8 units C. 20 units D. 5 units
Factor completely, if possible.y2 - 16
A. (y2 + 4)(y2 - 4) B. (y + 4)(y - 4) C. (y - 4)(y - 4) D. (y + 16)(y - 16)