# Math

Can I get some help with this question?
"If C is a 5 x 1 matrix and D is a 3 x 5 matrix, what are the dimensions of DC?"

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1. better review matrix multiplication.
pxq * qxr = pxr
So, DC will be 3x5 * 5x1 = 3x1
Note that CD is undefined.

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2. For some reason, my course skipped over matrix multiplication, but Ill look it up online. Thank you.

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3. I find it hard to believe that the course skipped a topic it is assigning for you to do.

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