Section 3: Matrices 3-56 A = [2-919] 8 = [2 14 ²1 B 27 14 -8 21 Solve the following: 5) A+B 16) B+ C 17) A-C 18) B-C 9) 2 B 20) 3 C (21) 2A + 3B (22) 4A +58 +6C C = 377 10 15 21.26 30

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A: Topic:- algebra

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A: 1 yd = 36 in.

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A: Topic:- geometry

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A: Solve for (x, y) as indicated; use ordered pairs in the answers (see attached)

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A: Topic:- algebra

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Q: How to find the cofactor of a 4x3 matrix? Also, cite an example.

A: Given 4 x 3 matrix  And we need to find the cofactor of 4 x 3 matrix.

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A: answer is in next step

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