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matrix1 - ECON 331 Tutorial Homework for Week One SHORT...

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ECON 331 Tutorial Homework for Week One SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. 1) Perform the indicated operations and simplify your answer: 3 -1 4 2 6 -8 + 2 4 -1 0 5 -4 3 1) 2) Perform the indicated operations and simplify your answer: 3 0 0 -1 2 -4 1 9 0 -3 2) 3) If A = 1 2 3 3 4 5 ; B = 2 -1 -2 1 -3 -2 , then find ( A + B ) T . 3) 4) Find x , y , z , u , t , v such that x y z u t v + 2 1 2 3 4 5 6 = 8 3 5 9 8 14 4) 5) Perform the indicated operation and simplify your answer: 1 -1 0 2 3 4 1 0 5 1 -2 3 5) 6) Perform the indicated operation and simplify your answer: 2 4 3 1 0 6) 7) Perform the indicated operations and simplify your answer: 2 3 1 - 1 2 -3 0 1 0 7) 8) Use matrix multiplication to represent the system: 3 x + 2 y = 2 4 x + y = 5 8) 9) Use matrix multiplication to represent the system: 4 x + 6 z = 3 x - y + z = 4 3 x + y - z = 5 9) 10) Let A = 1 2 2 -1 . Find A 2 . 10) 11) Let A = 1 1 2 -1 ; B = 3 -5 -9 2 ; C = -2 2 4 -1 . Find A B + 2 C 11) 12) An appliance store has 25 refrigerators, 30 ranges, and 10 dishwashers in stock. If the value
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