Not including tax, a total of 19 pens and markers cost $11.50. The pens cost $0.25 each, and the markers cost $0.75 each. Write the system of equations that could be used to solve for the number of pens, p, and the number of markers, m, bought.(4 points)

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p + m = Response area

Response area p + Response area m = Response area

p + m = 19

0.25p + 0.75m = 11.50

p + m = 19

0.25p + 0.75m = 11.50

The system of equations that could be used to solve for the number of pens, p, and the number of markers, m, bought is:

1) p + m = 19
This equation represents the total quantity of pens and markers purchased, which is given as 19.

2) 0.25p + 0.75m = 11.50
This equation represents the total cost of the pens and markers, which is given as $11.50. Since the cost of each pen is $0.25 and the cost of each marker is $0.75, we multiply those values by the respective quantities of pens and markers (p and m) and then add them together to get the total cost.