Decide whether the matrices are inverses of each other. (Check to see if their product is the identity matrix I.)
-$$
\begin{aligned}
1.5 x+3.1 y-2.3 z+0.6 w &=2.7 \
6.1 x-0.5 z-3.4 w &=0.8 \
11.5 y-2.2 w &=0 \
4.0 x+3.0 y-2.1 z &=9
\end{aligned}
$$
A) $ (7.9,2.4,9.0,12.3) $
B) $ (3.6,1.1,4.1,5.6) $
C) $ (3.2,1.0,3.7,5.0) $
D) $ (4.3,1.3,4.9,6.7) $

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The Answer of Decide whether the matrices are inverses of each other. (Check to see if their product is the identity matrix I.)
-$$
\begin{aligned}
1.5 x+3.1 y-2.3 z+0.6 w &=2.7 \
6.1 x-0.5 z-3.4 w &=0.8 \
11.5 y-2.2 w &=0 \
4.0 x+3.0 y-2.1 z &=9
\end{aligned}
$$
A) $ (7.9,2.4,9.0,12.3) $
B) $ (3.6,1.1,4.1,5.6) $
C) $ (3.2,1.0,3.7,5.0) $
D) $ (4.3,1.3,4.9,6.7) $