QUESTION 6
A man has $185,000 invested in three properties. One earns 12%, one 10% and one 8%. His annual income from the properties is $18,000 and the amount invested at
8% is twice that invested at 12%. How much is invested at each property?
Given the matrix, find the amount invested at 10%
$\begin{bmatrix} 1 & 1 & 1 \\ 0.12 & 0.1 & 0.08 \\ -2 & 0 & 1 \end{bmatrix} \begin{bmatrix} 185,000 \\ 18,000 \\ 0 \end{bmatrix}$
Oa $ 110,000
Ob $27,000
Oc $178,000
Od $ 157,000