Final-ExamTemplate

# Final-ExamTemplate - Lyndsey McClain MAT 205 Final Exam...

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Lyndsey McClain MAT 205 Final Exam Answers You may use whatever method you deem correct (unless otherwise stated)BUT you MUST show(EXCEL) or outline steps(Calculator). Questions 1 – 40 are worth  5 pts each  for a complete solution. (TOTAL 200 pts) (Formulas, work, or  detailed explanation required.)   Question 41 – 50, DO ONLY FIVE(5) OF THE TEN(10) PROBLEMS worth 10 pts each for a complete solution, (TOTAL 50 pts) (Formulas, work required.)Indicate which problems you DO NOT want counted. Pro b. Ans Complete Solution 1 B 9 2 7 undefined 3 3 0 - = = - 2 B -5y=4x+11 5y 4x+11 5y 5 = - = y = - 4 11 x - 5 5 m = - 4 5 3 C y-16.1= 18.3 16.1 20.0 16.5 - - (x-16.5) y-16.1=0.623(x-16.5) y-16.1-0.63(x-16.5)=0 y-(0.63x-10.37_-16.1=0 y-0.623x-5.73=0 (y-0.623x-5.723)+(0.623x+5.723)=0.623 y=0.623x+5.723 4 B 1463/(2.40-1.00) = 1045 5 B used calculator 6 A 7 A 7x + 3y + 5z = 0 < ---- eq1 3x + y + 2z = 0< ---- eq 2 multiply eq 2 by -3 --> 3x + y + 2z = 0 -9x - 3y - 6z = 0 <--- eq 3 then eq 1 add to eq 3 7x + 3y + 5z = 0 -9x - 3y - 6z = 0 7x - 9x - 6z + 5z = 0

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Final-ExamTemplate - Lyndsey McClain MAT 205 Final Exam...

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