stefanie bought a pack of pencils for 1.75 and some erasers that cost 0.25 each, she paid a total of 4.25 for these items. how many erasers did she buy

10 erasers because 4.25-1.75 = 2.50 then you have to divide to find how many erasers there are get 10 (2.50:0.25=10)

Subtract the cost of the pencils from the total cost. This will be he amount she spent on erasers. Then divide that amount by the cost of each eraser to get the total.

4.25 - 1.75 = 2.50 spent on erasers

2.50 / 0.25 = 10

She bought 10 erasers.