## Sup_open~study 2 years ago determine whether the matrix X3x5 +Y5x9 is defined if so state the dimensions of the product

1. scarydoor

do you mean, you want to know if you can add one matrix that is 3x5 in dimensions to another matrix that is 5x9 in dimensions?

2. Sup_open~study

that and i need help working it :)

3. scarydoor

Well it's just a definition of matrix arithmetic that to add two matrices, their dimensions need to be the same.

4. Sup_open~study

ok so we can't add these ??

5. scarydoor

If the matrix dimensions are not the same, then you can't add them.

6. Sup_open~study

ok so they are the same so i can add them

7. scarydoor

Are they the same, or not?

8. Sup_open~study

the same ??

9. Sup_open~study

i think

10. scarydoor

What are the dimensions?

11. Sup_open~study

like 5x9 ???

12. scarydoor

and the other one?

13. Sup_open~study

3x5

14. scarydoor

so how are they the same?

15. Sup_open~study

i was think because they were both had an X but i see what you are saying now xD

16. scarydoor

...

17. Sup_open~study

so you can't do it ??? is that right