1)Consider the following system of equations and its graph:

{4x-y=9

{-3x-2y=-15

2)Solve the system of equations by graphing:

{y=-2x+2

{y=12x-3

3)Solve the linear system of equations by any method.

{-4x-3y=-20

{x=5y-18

4)Solve the linear system of equations by any method.

{-6x+5y=-23

{-2x+30y=-36

5)Solve the linear system of equations by any method.

{4x+8y=-16

{6x+12y=-27

6)Solve the linear system of equations by any method.

{3x-5y=-31

{5x+y=-33

7)Solve the linear system of equations by any method

{x+2y=-5

{6y=-15-3x

8)The Nutty Professor sells cashews for $6.80 per pound and Brazil nuts for $5.00 per pound. How much of each type should be used to make a 34 pound mixture that sells for $5.69 per pound?

Round answers to the nearest pound.

_____________pounds of cashews

___________pounds of Brazil nuts

9)Sergio just retired, and has $880,000 to invest. A very safe Certificate of Deposit (CD) account pays 2%, while a riskier bond fund pays 8.5% in interest. Sergio figures he needs $40,000 a year in interest to live on. How much should he invest in each account to make enough interest while minimizing his risk?

$___________at 2%

$________________at 8.5%