Mrs. Finch’s first-grade class was holding a used book sale. Some books were sold for $0.25 and others sold for $0.35. The first customer spent $3.15 for 11 books? How many $0.25 books and $0.35 books did the customer buy?

In the diagram, points d and e are marked by drawing arcs of equal size centered at b such that the arcs intersect ba and bc. then, intersecting arcs of equal size are drawn centered at points d and e. point p is located at the intersection of these arcs. based on this construction, m , and m