Adesk and a chair cost a total of $76. the desk costs 3 times more than the chair. how much does the cost? how much more does the desk cost than the chair?

x=chair

3x=desk

3x+x=76

4x=76

x=19 dollars is chair

3x= 57 dollars is desk

Now subtract to get difference which is 38 dollars.

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

a is 8.b is 10.c is 10.5. d is -.5

step-by-step explanation:

just minus the smallest number from the biggest.