AP Precalculus Quiz
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FUNCTIONS INVOLVING PARAMETERS, VECTORS, AND MATRICES
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Matrices can represent systems of equations and also organize economic relationships. In a two-sector input-output setting, the matrix A=[0.050.150.100.20]\mathbf{A}=\begin{bmatrix}0.05&0.15\\0.10&0.20\end{bmatrix} lists input needs (rows) per $1 of output (columns). If total output is x=[40100],\mathbf{x}=\begin{bmatrix}40\\100\end{bmatrix}, then Ax\mathbf{A}\mathbf{x} computes intermediate demand; addition and subtraction compare different coefficient tables. Using the matrix model described, which calculation gives the intermediate demand coming from input sector 2?
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