- Use the
**elimination**method to solve each of the following systems: -
- Let ,
,
and
.
- Give the dimensions of each matrix, and identify any square, column, or row matrices.
- Find the following if possible:
- 2AD.
- BC.
- CA.

- Use the
**Gauss Jordan**method to solve the following system: - Use the method of
**matrix inverses**to solve the following system: - 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?
- 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.

**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:

If you would like to check your answers, click on Answer.

If you would like to practice on the comprehensive final, click on Final.

If you would like to go back to the original menu, click on Menu.

Contact us

Math Medics, LLC. - P.O. Box 12395 - El Paso TX 79913 - USA

users online during the last hour