In the energy demand problem above, the demand vectors could be represented in a 2 row matrix, where row 1 contains the energy demands of the consumers and row 2 contains the energy demands of the energy industries:D = 
A researcher is studying the effects on the local economy of changes in the original demand matrix. He models one change by the matrix equation D1 = D + 0.5D. Calculate the new demand matrix in his model.
What will be an ideal response?
D1 = 
Mathematics
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Find all the first order partial derivatives for the following function.f(x, y) = xye-y
A. 
= ye-y; 
= xe-y(1 - y)
B. 
= ye-y; 
= xe-y
C. 
= ye-y; 
= xe-y(y - 1)
D. 
= ye-y; 
= - xye-y
Mathematics
Determine the number of subsets of the set.A set of vowels of the English alphabet, assuming y is not considered a vowel
A. 32 B. 18 C. 24 D. 12
Mathematics
Fill in the blank with one of the words or phrases listed below.
means "per hundred."
A. Base B. Percent C. Amount D. Commission
Mathematics
Multiply.(6x - 1) (x2 - 4x + 1)
A. 6x3 - 25x2 + 10x - 1 B. 6x3 - 24x2 + 6x + 1 C. 6x3 - 23x2 + 2x - 1 D. 6x3 + 25x2 - 10x + 1
Mathematics