Question

I need help ASAP please

Answer 1

c.
`\left[\begin{array}{ccc}-30&22&8\\-4&-4&16\\30&-28&18\end{array}\right]`

Explanation:

First, find 2A:

A:

`\left[\begin{array}{ccc}-1&9&2\\10&-10&2\\-5&6&-5\end{array}\right]`

2A:

`\left[\begin{array}{ccc}-2&18&4\\20&-20&4\\-10&12&-10\end{array}\right]`

Next, find 4B:

B:

`\left[\begin{array}{ccc}7&-1&-1\\6&-4&-3\\-10&10&-7\end{array}\right]`

4B:

`\left[\begin{array}{ccc}28&-4&-4\\24&-16&-12\\-40&40&-28\end{array}\right]`

Now, subtract the two matrices:

`\left[\begin{array}{ccc}-2&18&4\\20&-20&4\\-10&12&-10\end{array}\right]` -
`\left[\begin{array}{ccc}28&-4&-4\\24&-16&-12\\-40&40&-28\end{array}\right]`

`\left[\begin{array}{ccc}-30&22&8\\-4&-4&16\\30&-28&18\end{array}\right]`

c.
`\left[\begin{array}{ccc}-30&22&8\\-4&-4&16\\30&-28&18\end{array}\right]`

Answer 2

The answer is C (also it won’t let me respond with out more words so this part doesn’t matter)