Make fMat be a 5x3 matrix of random integers with values from -3 to 3
(Hint: use randi)
Test for randomness could be tightened (cf. Solution 1490988).
Back to basics 8 - Matrix Diagonals
Find the area of the four walls
y equals x divided by 2
06 - Matrix Equations 1
05 - Vector Equations 3
06 - Matrix Equations 3
01 - Scalar variables
03 - Matrix Variables 5
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