Review Ch 6-7 KEY

Review Ch 6-7 KEY - FIU: MGF1106 QUIZ 4 KEY Sections 6.1,...

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Unformatted text preview: FIU: MGF1106 QUIZ 4 KEY Sections 6.1, 6.3-4, 7.1-3 Show work on this test paper (at least the set-up)! 1. Solve by substitution: - = - - = x y x y 3 2 6 2 3 1. _ {12, 21} ( 29 =- =- =- 1 2 3 2 3 2 24 3 y x y y ( 29- = -- + = -- =-- 3 2 6 3 4 2 6 6 12 3 x x x x x 2. Solve by addition: - = - = - x y x y 4 3 5 3 2 2 2. _ (-16, -23) __- - =- = - = -- + = x y x y x y x y 2 3 4 3 5 8 6 1 0 3 2 2 9 6 6 ur uuur-x = 16 x = -16 3(-16) 2y = -2-48 + 2 = 2y-46 / 2 = y = -23 3. Mr. and Mrs. Thompson invested $10,000, some in a CD that yielded 5% 3. CD = __ $3,600 __ simple interest and some in a mutual fund at 7% simple interest. If the income from both investments at the end of one year was $628, how much MF = _ $6,400 _ was invested in each. , , , , . . , , , , c m c m m m c m c m c c + =- + - = - = = + = + = + = = 10 000 5...
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Review Ch 6-7 KEY - FIU: MGF1106 QUIZ 4 KEY Sections 6.1,...

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