Recognize the elementary row operation used and determine the missing entry.
? 
A. 4
B. - 
C. -4
D. 
Answer: B
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Use reduction formulas to evaluate the integral.
A. - 
cot3 4x + 
cot 4x + x + C
B. - 
cot2 4x + 
cot 4x - x + C
C. - 
cot3 4x + 
cot 4x + C
D. - 
cot3 4x - 
cot 4x + x + C
Determine the real solutions to the system of nonlinear equations.5x2 - 3y2 = 683x2 + 2y2 = 56
A. (4, -2), (4, 2) B. (4, 2), (-4, 2), (4, -2), (-4, -2) C. (-4, -2), (-2, -4) D. (4, 2), (2, 4), (-4, -2), (-2, -4)
Solve the system of equations using Cramer's Rule if it is applicable. If Cramer's Rule is not applicable, say so.
A. x = 5, y = -2; (5, -2) B. x = 2, y = -5; (2, -5) C. x = -5, y = -2; (-5, -2) D. x = -2, y = 5; (-2, 5)
Set up the linear programming problem.A steel company produces two types of machine dies, part A and part B. The company makes a 
profit on each part A that it produces and a 
profit on each part B that it produces. Let 
number of part A produced in a week and 
number of part B produced in a week. Write the objective function that describes
the total weekly profit. A. z =2(x - 6) + 6(y - 2) B. z = 8(x + y) C. z = 2x + 6y D. z = 6x + 2y