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Solving Systems of Equations Word Problems and Matrix Inverses

6. How many 7-card hands are possible with a 52-card deck?

7. The owner of nuts2u snack shack mixes cashews worth $5.50 a pound with peanuts worth $2.30 a pound to get a half-pound mixed nuts bag worth $1.80. How much of each kind of nut is included in the mixed bag?

8. Determine whether the matrices are inverse.
[5 3] [2 -3]
[3 2] and [-3 5] NOTE: all in one bracket not two.

9. Use the gauss-jordan method to find A-1, if it exists
A=[1 1]
[1 -5] NOTE: all in one bracket not two.

10. Solve the system using the inverse of the coefficient matrix of the equivalent matrix equation?
-5x+3y=8
3x-6y= -30

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Solving Systems of Equations Word Problems and Matrix Inverses are investigated. The solution is detailed and well presented.

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