Stitz-Zeager_College_Algebra_e-book

A b c x2 y 2 x2 4 y 2 x1y x2 4y 2 1 4 0 4 x

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Unformatted text preview: (c) Q = 9 −4 −2 1 2x ln(x) 1 1 0 −3 0 x3 x3 (d) L = 2 −2 8 7 3 − x4 1−3xln(x) (h) H = 4 −5 0 16 0 4 6 −3 1 0 41 4 −3 (e) F = 3 1 2 6 2. Use Cramer’s Rule to solve the system of linear equations. x+y+z 3x + 7y = 26 (a) 2x − y + z 5x + 12y = 39 (d) −3x + 5y + 7z x + y = 8000 (b) 0.03x + 0.05y = 250 3x + y − 2z = y x 4x − y + z = (e) 2−5 = 1 (c) x − 3y − 4z = 6x + 7 y = 3 3. Use Cramer’s Rule to x1 − x3 2x2 − x4 (a) x1 − 2x2 + x3 −x3 + x4 =3 =0 =7 10 5 −1 solve for x4 in the following systems of linear equations. 4x1 + x2 = 4 = −2 = 0 x2 − 3x3 = 1 (b) = 0 0 10x1 + x3 + x4 = −x2 + x3 = −3 = 1 4. Find the inverse of the following matrices using their determinants and adjoints. 12 −7 4 6 −3 (a) B = −5 3 4 −3 (b) F = 3 1 2 6 5. Carl’s Sasquatch Attack! Game Card Collection is a mixture of common and rare cards. Each common card is worth $0.25 while each rare card is worth $0.75. If his entire 117 card collection is worth $48.75, how many...
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This note was uploaded on 05/03/2013 for the course MATH Algebra taught by Professor Wong during the Fall '13 term at Chicago Academy High School.

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