1.

7x + 4y =12

X + 2y = -4

choices:

a. (-4, 4)

b. (4, 4)

c. 4, -4)

d. None of the above

2.

x + 2y = -4

x - 2y = 8

Choices:

a. (2, 5)

b. (2, -3)

c. (2, -2)

d None of the above

3.

7x -2y = 6

X -2y = -6

a. (2, 4)

b. (3. -2)

c. (1, 2)

d. None of the above

1. Write in matrix form and use the inverse matrix method to solve the system

3x -4y =1

X + 5x =3

1. Explain in your own words your understanding of the Leontief Input - output analysis.

Give an example of the Technological Matrix.

6. Alima deposits $520 into a savings account that has a 3.5% interest rate compounded monthly. What will be the balance of Alima's account after two years?

7. Ted has $1,780.80 in his savings account that he opened 6 years ago. His account has an annual interest rate of 6.8% compounded annually. How much money did Ted use to open his savings account?

1. A loan company charges $30 interest for one-month loan of $500. Find the annual interest rate?
2. Miguel borrows $150,000 at 5% annual interest on a 30-year loan, what is his monthly payment?

1. Extra Credit:

What is your understanding of Sinking Fund in your own words.