Question

Add matrix M
and matrix N
.

M=⎡⎣⎢124−9⎤⎦⎥ N=⎡⎣⎢872⎤⎦⎥


(1 point)

M+N=[2011 −7]


M+N=[1284 7−92]


M+N=⎡⎣⎢2011−7⎤⎦⎥


M+N=⎡⎣⎢124−9872⎤⎦⎥

Answer 1

I can’t be sure how M and N are arranged from the way they’re typed. Could you retype them in one of these clear forms?

- row notation: M = [1 2 4; -9 ?] (rows separated by semicolons)
- bracketed rows: M = [[1,2,4],[-9,x,y]]
- column form: M = [1;2;4;-9]

Matrix addition is done elementwise, so M+N must have the same dimensions as M and N and each entry is sum of corresponding entries.

If you meant, for example,
- M = [[1,2],[4,-9]] and N = [[8,7],[2,?]] — please fill the missing entry and I will compute M+N;
or
- M = [1 2 4; -9 ? ?] and N = [8 7 2; ? ? ?] — please give the full entries.

Tell me the matrices in one clear format and I’ll compute M+N.