A matrix is diagonal if

In other words, you want non-zero elements only when the indices of the row and the column are the same: the first element of the first row must be non zero, the second element of the second row must be non-zero, and so on. All other elements must be zero.
Answer:
vfhgfhfjhfvhjgv
Step-by-step explanation:
Answer:
4x+5
Step-by-step explanation:
Answer:
24 feet 9 inches
Step-by-step explanation:
14 ft + 9 ft = 23 ft
10 in + 11 in = 21 in - 1 ft = 9 in
23 feet + 1 ft + 9 in = 24 feet and 9 inches
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