The number of books bought this year was 15% more than the number of books bought last year. This year we bought 345 books. What was the orignal number of books purhased

293 books were bought last year.

Step-by-step explanation

The number of books purchased this year is 15% more than that of last year. If the number of books bought this year is 345 books. Then last year the number of books bought is 345 x 15% = 51.75 appx 52 books

The number of books bought last year will be 345 - 52 = 293 books

6 spoons of sugar for every 21 cups of flour

step-by-step explanation:

geometry: triangles

solvers

lessons

answers archive

call the larger triangle abc

then the smaller triangle cde is similar to abc (all angles are equal, aaa).  

ab is the side that is 36, and we wish to find de, the side corresponding to ab

area_cde = area_abc - area_cde --> area_abc / area_cde = 2

let x=length of de

ratio of areas = (ratio of sides)^2

+2+=+%2836%2fx%29%5e2+

+2+=+1296%2fx%5e2+

++x%5e2+=+1296%2f2+=+648+

25.45584