Solve the problem.
-Suppose that the manufacturing cost of a precision instrument is approximated by $M(x, y)=20 x^{2}+40 y^{2}-3 x y$, where $x$ is the cost of materials and $y$ is the cost of labor. Find $\mathrm{M}_{\mathrm{X}}(4,9)$.
A) 708
B) 212
C) 3132
D) 133

Question

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The Answer of Solve the problem.
-Suppose that the manufacturing cost of a precision instrument is approximated by $M(x, y)=20 x^{2}+40 y^{2}-3 x y$, where $x$ is the cost of materials and $y$ is the cost of labor. Find $\mathrm{M}_{\mathrm{X}}(4,9)$.
A) 708
B) 212
C) 3132
D) 133

Solve the Problem M(x,y)=20x2+40y2−3xyM(x, y)=20 x^{2}+40 y^{2}-3 x yM(x,y)=20x2+40y2−3xy , Where xxx

Solve the Problem $M(x, y)=20 x^{2}+40 y^{2}-3 x y$ , Where $x$