To form the system of equations for this problem, we can use the following two equations based on the information provided:
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The total number of pens and markers: \[ p + m = 19 \]
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The total cost of the pens and markers: \[ 0.25p + 0.75m = 11.50 \]
So the system of equations can be written as:
- \( p + m = 19 \)
- \( 0.25p + 0.75m = 11.50 \)
You can fill in the response areas with the parts of these equations. Specifically:
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For the first equation:
- \( \text{Response area for } p + m = \text{Response area for } 19 \)
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For the second equation:
- \( \text{Response area for } 0.25p + 0.75m = \text{Response area for } 11.50 \)
Please replace "Response area" with the correct values according to the system you have been given.