Edwin rented for movies for the weekend. DVDs cost two dollars to rent and Blu-ray cost five dollars to rent. If Edwin paid $11 which system of equation can be used to determine X, the number of DVDs rented and y, the number of Blu-ray rented?

Step-by-step explanation:

The actual sum was 3 DVDs and 1 BlueRay.

x + y = 4

2x + 5y = 11

No systems are given, but you can look for something that looks like the above 2 equations.

geometry: triangles

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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