Decide Whether the Matrices Are Inverses of Each Other $$\begin{aligned}1.5 x+3.1 y-2.3 z+0.6 w &=2.7 \\6.1 x-0.5 z-3.4 w &=0.8 \\11.5 y-2.2 w &=0 \\4.0 x+3.0 y-2.1 z &=9\end{aligned}$$

question 37

Multiple Choice

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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