Solve the system using the inverse matrix method.
A. x = 3, y = -5, z = -4; (3, -5, -4)
B. x = 1, y = -16, z = -12; (1, -16, -12)
C. x = 25, y = -39, z = -15; (25, -39, -15)
D. x = -1, y = -11, z = 8; (-1, -11, 8)
Answer: D
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Solve the problem.Find the number of units that must be produced and sold in order to yield the maximum profit, given the following equations for revenue and cost:R(x) = 20x - 0.5x2C(x) = 4x + 5.
A. 24 units B. 16 units C. 17 units D. 21 units
Two statements are listed in which p, q, and r represent propositions. Are the two statements logically equivalent?(p or q) or r; p or (q or r)
A. No B. Yes
Evaluate the integral.
A. 15,624 B. 6696 C. 2232 D. 11,160
Solve the formula for the indicated variable. Then use the supplied values to solve the equation.The total surface area of a rectangular solid of length L, width W, and height H is given by 
Solve for H. What is the height if the area A is 2768 cm2, the length is 35.5 cm, and the width is 12.9 cm? (All measurements are approximate.)
A. H = 
= 47.7 cm
B. H = 
= 19.1 cm
C. H = A - 2LW - 2L - 2W = 1760 cm
D. H = 
= 1160 cm