Subtracting a number is the same as adding its opposite. use this understanding to complete each of the equations below. enter numbers to evaluate ‐13−23
.

‐13−23= ‐13 +

=

enter numbers to evaluate ‐13−(‐23)
.

‐13−(‐23)= ‐13 +

‐13−23= ‐13 +(-23) and ‐13−(‐23)= ‐13 +23

Step-by-step explanation:

Adding the opposite of -23:

‐13−23= ‐13 +(-23)

Adding the opposite of -23

‐13−(‐23)= ‐13 +23

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+

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