- Use the elimination method to solve each of the following systems:
- Let ,
,
and
.
- Use the Gauss Jordan method to solve the following system:
Answer: x=-1, y=1, and z=-2.
- Use the method of matrix inverses to solve the following
system:
Answer: x=1 and y=-1.
- 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?
Answer: The money in the account will be approximately $148,809.
- 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.
Answer: Each payment will be approximately $2475.39.
Formulas
- Future value for simple interest:
- Future value for compound interest:
- Future value of an ordinary annuity:
- Future value of an annuity due:
- Present value of an annuity:
- Amortizing a loan:
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Tue Aug 12 21:51:10 MDT 1997
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