Solve the problem.
-Carney and Dobler sell auto and hazard insurance. Their sales, in dollars, for the months of July and August are given in the following matrices. Auto Hazard
July: $ \left[\begin{array}{ll}22,000 & 45,000 \ 19,000 & 27,000\end{array}\right] $ Carney
August: $ \left[\begin{array}{ll}25,000 & 44,000 \ 14,000 & 21,000\end{array}\right] $ Carney
Find a matrix that gives the increase (decrease) in sales by each salesman for each type of insurance from July to August.
A) $ \left[\begin{array}{rr}-3000 & 1000 \ 5000 & 6000\end{array}\right] $
B) $ [-80007000] $
C) $ \left[\begin{array}{rr}3000 & -1000 \ -5000 & -6000\end{array}\right] $
D) $ [8000-7000] $

Question

Quizplus · Accepted Answer

To find the increase or decrease in sales for each type of insurance by each salesman from July to August, subtract the July sales matrix from the August sales matrix. This results in: $ \left[\begin{array}{ll}25,000 - 22,000 & 44,000 - 45,000 \ 14,000 - 19,000 & 21,000 - 27,000\end{array}\right] = \left[\begin{array}{rr}3000 & -1000 \ -5000 & -6000\end{array}\right] $.

Solve the Problem [22,00045,00019,00027,000] \left[\begin{array}{ll}22,000 & 45,000 \\ 19,000 & 27,000\end{array}\right] [22,00019,000​45,00027,000​]

Solve the Problem $\left[\begin{array}{ll}22,000 & 45,000 \\ 19,000 & 27,000\end{array}\right]$