Test 1 - Name Math 5 Test 1 Please write neatly and clearly...

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Name: Math 5: Test 1 February 20, 2012 Please write neatly and clearly. Problems 1-4 are multiple choice, and you do not need to show your work. Problems 5-9 are partial credit; you should show your work and identify your final answer. You may use a calculator. However, no cell phones or books may be used. Question: 1 2 3 4 5 6 7 8 9 Total Points: 5 10 20 5 10 20 10 10 10 100 Score: 1. (5 points) I am 30 years older than my daughter. In 12 years from now, I will be 3 times as old as she is. If we let x denote my age and y denote my daughter’s age, which of the following systems of equations would you solve to determine how old my daughter and I are? A. ( x + y = 30 3 x + 12 = y + 12 B. ( y = x + 30 3( x + 12) = y + 12 C. ( x = y + 30 x + 12 = 3( y + 12) D. ( x = y + 30 x - 12 = 3( y - 12) 2. (10 points) Given the matrices A = 1 0 2 0 1 3 0 0 1 , B = ± 3 1 0 0 3 1 ² , C = 1 - 1 0 2 - 2 0 compute the following. (a) CB + 3 A = ? A. Undefined B. ± 3 - 1 - 2 6 ² C. 1 0 0 0 1 0 0 0 1 D.
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Test 1 - Name Math 5 Test 1 Please write neatly and clearly...

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