Janelle wrote the matrix addition below.
3
-1
n
-5
0
4
1
-6
-7
-7
18
6
m-1
-9+
HE
-12 2 +
4.
0
3
10
12
-4
17
5+1
7
1
-18
8
14 -11
5
32 -28 20
Which statement is true?
(n+4)-7= 18
((m-1)+12)+1 = 12
© ((s+1)-18)+11 =-28
n+(m-1)+(5+1)=-28