Al Y. answered • 07/03/21

Math PhD, Over a decade of Academic and Industry Experience

- 15X+12Y ≤ 1500
- If Y=100, then 15X +12*100 = 15X + 1200 ≤ 1500. This means 15X ≤ 300 or X ≤ 20. At most 20 notebooks may be purchased.
- No, because: 15*70 + 12*40 = 1530 which is exceeds total budget of 1500.