Find the partial derivative.Let z = f(x, y) = 5(x + 4y - 4)2. Find 
.
A. 40x + 160y - 160
B. 20x + 80y
C. 40x + 160y + 160
D. 20x + 80y - 80
Answer: A
Mathematics
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B.
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C.
?3D. 714?3
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A. 6 B. 4 C. 12 D. 8
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Evaluate the expression for each value of x in the table. Then use the table to solve the equation.3 + (3x - 1) = -1 
What will be an ideal response?
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Find the area of the portion of the surface 
that lies above the triangular region with vertices 
, and 
class="wirisformula" align="middle" style="vertical-align: middle;" data-wiris-created="true" varid="variable_id_field" variablename="impvar_aceef4469aa04002beb092726" />. ? A. 16 B. 144 C. 72 D. 648 E. 1,296
Mathematics