precalculus matrix

Question

Perform the indicated operation.

0.5	1	5	3
5	4	−1
−2	0	1
−  0.2	6	7	3
−1	1	−3
7	5	−5
+  0.8	4	4	−1
4	6	1
1	0	0

Answer 1

It looks like they are all 3 x 3 matrices being multiplied by the scalar constant in red

For example, the first one is

0.5 * 1 5 3

5 4 -1

-2 0 1

for a product of 0.5 2.5 1.5

2.5 2 -0.5

-1 0 0.5