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The answer is:

Step-by-step explanation:

(Presuming you wanted to add these)

From the image that is given/shown, this is matrices.

In matrices, the numbers will somewhat correlate with each other!

From what is stated, "Find 3M + 7N"

We must substitute in M and N for the pair of matrices that are given:

M =  and N =

You will then be left with:

3  + 7

when then need to add these together:

1) First Multiply the matrix by 3, you'll get:

(Each number in the matrix is being multiplied by the values: 3 or 7)

2) Then Multiply the matrix by 7, and you'll get:

3) Add the matrices:

6 - 35 = -29

-9 - 7 = -16

0 + 14 = 14

18 + 63 = 81

After solving the matrices, you get:

36

step-by-step explanation: