Negative 2 fifths times negative 1 and one fourth A. negative 1 and one-tenth
B. negative one half
C. 1 and one-tenth
D. one-half

D one half

Step-by-step explanation:

-2/5 x -1 1/4 = 1/2

1 x 4 = 4 + 1 = 5

-2/5 x - 5/4 = 10/20 which will simplify to 1/2

geometry: triangles

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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

9987

step-by-step explanation: