Math For Social Sciences. Practice Exam

  1. Use the elimination method to solve each of the following systems:
  2. Let tex2html_wrap_inline112 , tex2html_wrap_inline114 , tex2html_wrap_inline116 and tex2html_wrap_inline118 .
  3. Use the Gauss Jordan method to solve the following system:


  4. Use the method of matrix inverses to solve the following system:


  5. A 45-year-old man puts $1,000 in a retirement account at the beginning of each quarter until he reaches the age of 60 and makes no further deposits. If the account pays 11% interest compounded quarterly, how much will be in the account when the man reaches age 60?
  6. A speculator agrees to pay $15,999 for a parcel of land; this amount, with interest, will be paid over 4 yr, with semiannual payments, at an interest rate of 10% compounded semiannually. Find the amount of each payment.


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Tue Aug 12 21:45:49 MDT 1997

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