To return the book to its library on time a student had to read 40 pages everyday, but he read 15 pages less a day and returned the book 6 days late. In how many days was the student supposed to read the book

Mathematics includes the study of such topics as quantity, structure, space, and change. It has no generally accepted definition. Mathematicians seek and use patterns to formulate new conjectures; they resolve the truth or falsity of such by mathematical proof

Step-by-step explanation:

Mathematics includes the study of such topics as quantity, structure, space, and change. It has no generally accepted definition. Mathematicians seek and use patterns to formulate new conjectures; they resolve the truth or falsity of such by mathematical proof

fher gjiergjerg ergiureg rg∉↓∑∫∉↔→β∪⇆

15 pages

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see attached graph