Systems by Matrix

A.5C - December 9

​Line up the like ________ in the equations.

1. 2nd (blue button), "Matrix"

2. Arrow up to B: rref(

3. Click enter

4. Alpha (green button), "Zoom"

5. 2 rows, 3 columns

6. Enter coefficients

   (number in front of variable)

​

​Write your variables as an __________ pair and ________ your answer.

​Calculator Steps:

​1.

​2.

Three popcorns and two sodas from the concession stand costs $13. Six popcorns and three sodas costs $24. If x represents the price of a popcorn and y represents the price of a soda, solve the system to find the price of the popcorn and soda.

The Presleys bought two adult tickets and five children tickets to the circus for $64. The Fosters bought four adult tickets and three children tickets for $72. If x represents adult tickets and y represents children tickets, solve the system using matrix.

Go to iXL V.14

Look at board for scoring