Which of the following sets of ordered pairs is not a direct variation?

(0, 0); (-2, 4); (3, -6)
(1, 1); (-2, -2); (3, 3)
(10, 2); (15, 3); (20, 4)
(0, 0); (1, 3); (2, 4)

answer:

4

step-by-step explanation:

4" (and any subsequent words) was ignored because we limit queries to 32 words.

x = 12

y = 15

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