Find the second-order partial derivative.Find fyy when f(x, y) = x ln (y - x).
A. 
B. - 
C. 
D. - 
Answer: B
Mathematics
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Solve the problem.The cost of manufacturing a molded part is related to the quantity of parts produced during a production run. When 100 parts are produced, the cost is 
. When 600 parts are produced, the cost is $4300. What is the average cost per part?
A. $6.67 per part B. $0.13 per part C. $8.00 per part D. $9.00 per part
Mathematics
Factor completely.294x2 - 216y2
A. 6(7x - 6y)(7x + 6y) B. 6(7x + 6y)2 C. (7x - 6y)(42x + 36y) D. (42x - 36y)(7x + 6y)
Mathematics
Show by substitution whether the number r is a solution of the corresponding quadratic equation.x2 + 2x - 99 = 0; r = 9
A. Yes B. No
Mathematics
Divide. Simplify the final answer.
÷ 
A. 
B. 
C. 
D. 
Mathematics