Question

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Answer 1

Distribute -5 to each numbers

Answer 2

when we multiplying a matrix by a scalar we simply multiply the every element.
here is a different example of scalar multiplication
\[\color{salmon}6\begin{bmatrix}2&-7\\-3&4\end{bmatrix}=\begin{bmatrix}\color{salmon}6\times2&\color{salmon}6\times-7\\\color{salmon}6\times-3&\color{salmon}6\times4\end{bmatrix}=\begin{bmatrix}12&-42\\-18&24\end{bmatrix}\]

Answer 3

okay, this?

Answer 4

multiply -5 to evry element inside the matrice