The table shows the weight of a particular item. Number of items Weight (ounces)

210

525

1260

840

(so each item weighs 5 ounces)
Write an algebraic expression to describe the relationship. Let n represent the number of items.

c. 4 1/4 pounds

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value

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