Question

Matrices - how to find x and y when matrix (x y) is multiplied by another matrix which gives an answer?

Answer 1

`x=4, y=6`

Explanation:

To find `x` and `y` we need to find the dot product of the two vectors.

`((x,y))((7),(3))=((7x,7y),(3x,3y))`

`7x=28`

`x=28/7=4`

`3(4)=13`

`7y=42`

`y=42/7=6`

`3(6)=18`