A flashlight is projecting a triangle onto a wall, as shown below,
1 answer:
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A matrix A is identified as 
and matrix B is identified as 
.If the number of columns in A is the same as the number of rows in B, then you can multiply the matrices together. The product matrix, then, is made up of what's left over: rows from A and columns from B. So your answers above are, in the first blank: columns, and in the second blank: rows.