Mark is buying supplies for his students. He is buying a notebook (n) and a pack of pencils for each of his 25 students. Each pack of pencils costs $1.25. If Mark's total cost is $156.25, which of the following equations can be used to find how much each notebook cost? Select TWO that apply.
A - 25(n) +31.25 =165.25
B - 1.25(n)+25=156.25
C- 25(n)=156.25+31.25
D - 25(n)=156.25−31.25

$5

Step-by-step explanation:

   Note. There are no options to select.

Let the notebook cost x, then Mark spent:

   25x + 25*1.25 = 156.25

   25x + 31.25 = 156.25

   25x = 156.25 - 31.25

   25x = 125

   x= 125/25

   x= 5

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