Find the second-order partial derivative.Find fxx when f(x, y) = ln( 2x + 9y ).
A. 
B. - 
C. - 
D. - 
Answer: D
Mathematics
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Simplify by factoring. Assume that any variable in a radicand represents a positive real number.
A. 
B. (x + y)
C. (x + y)
D. (x + y)
Mathematics
Write the quotient in lowest terms.
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.A company makes 3 types of cable. Cable A requires 3 black, 3 white, and 2 red wires. B requires 1 black, 2 white, and 1 red. C requires 2 black, 1 white, and 2 red. The company used 95 black, 100 white and 80 red wires. How many of each type of cable were made?
A. 15 A; 20 B; 15 C B. 48 A; 20 B; 12 C C. 20 A; 15 B; 15 C D. 15 A; 16 B; 15 C
Mathematics
Add or subtract.(7x8 - 9x4 + 5x2 + 8) + (5x7 + 7x4 - 6x)
A. 7x8 + 5x7 + 2x4 + 5x2 - 6x + 8 B. 12x8 - 2x4 + 5x2 - 6x + 8 C. 7x8 + 5x7 - 2x4 + 5x2 - 6x + 8 D. 12x8 - 16x4 + 5x2 - 6x + 8
Mathematics