Complete the statement so that the indicated property is illustrated. Simplify the answer, if possible.-9m - 6n =
A. (-9 - 6)mn = -15mn
B. -6n - 9m = -15nm
C. (-9 + 6)mn = -3mn
D. -6n - 9m
Answer: D
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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(y - 1)
B. 
= ye-y; 
= xe-y
C. 
= ye-y; 
= xe-y(1 - y)
D. 
= ye-y; 
= - xye-y
Solve. If necessary, round to the nearest tenth.If a flagpole 9 feet tall casts a shadow that is 12 feet long, find the length of the shadow cast by an antenna which is 18 feet tall.
A. 21 ft B. 6 ft C. 24 ft D. 13.5 ft
Use the vertex and the direction in which the parabola opens to determine the relation's domain and range.y = x2 + 2x - 4
A. Domain: [-5, ?) Range: (-?, ?) B. Domain: (-?, ?) Range: [-5, ?) C. Domain: (-?, ?) Range: (-5, ?) D. Domain: (-5, ?) Range: (-?, ?)
Use a calculator to graph the function. y = -sin3x
A. 
B. 
C. 
D. 