Matrix RREF

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Bell Ringer: Solve the system of equation using either Substitution or Graphing.

$$x\ +\ y\ =\ 15$$ & $$-2x\ +\ 5y\ =\ -2$$

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Select answer

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Select answer

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Systems by Matrix

A.5C - December 9

​Line up the like ________ in the equations.

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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)

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

​Calculator Steps:

​1.

​2.

Drag and Drop

3. Solve this system with Matrix:

$$4x\ -\ 3y\ =\ -7$$ & $$-4x\ +\ 5y\ =\ 1$$

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Placeholder

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Placeholder

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Drag these tiles and drop them in the correct blank above

-4

-3

4

3

-2

2

-5

5

-6

6

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.

Multiple Choice

Solve the system using matrix:

$$-x\ +\ 5y\ =\ -29$$

$$2x\ -\ 5y\ =\ 38$$

• (-4, 9)

• (4, 9)

• (-9, -4)

• (9, -4)

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.

Fill in the Blanks

How much money are the children tickets worth?

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Go to iXL V.14

Look at board for scoring