Ryan has a basket of 20 blue marbles and 15 red marbles. What is the probability that the next marble he randomly chooses will be blue?

Probability that he chooses blue next is 4/7.

Step-by-step explanation:

In total, there are 35 marbles, since 20 + 15 = 35

There are 20 blue marbles out of the 35 marbles, so that's 20/35.

20/35 simplified is 4/7.

i think is g(1)=-1.

hope that i can

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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