## Linear Algebra and Its Applications (5th Edition)

a. The output of mine #1 over 5 days b. $\begin{bmatrix} 150\\2825 \end{bmatrix} = x_1v_1 + x_2v_2$
a. Since $v_1$ represents the output of mine #1 over one day, multiplying it by 5 yields the output over 5 days. b. The left hand side shows the desired quantity of copper and silver to be produced, and the right hand side shows the amount that will be produced given a particular number of days of production at mines 1 and 2.