Question

Janelle wrote the matrix addition below.

3
-1
17
-5
0
4
1
1
-6
-7
-1
-7
18
6
6
m-1
-9 +
0 -12 2 +
4
0
3
10
12
-4
17
S+ 1
7
1
-18
8
14 -11
ר_
32 -28
20
Which statement is true?
O (n+4)-7 = 18
O ((m-1)+12)+0= 12
O ((5+1)- 18)+11--28
On+(m-1)+(5+1)=-28

Answer 1

-4

Explanation: