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torisob [31]
3 years ago
7

How do you solve this??

Mathematics
1 answer:
DochEvi [55]3 years ago
8 0

Answer:

Step-by-step explanation:

Hi Millie.

First we can realize that the number of cubes of each type does not matter, only the ratios between them. We see that if there are x yellow cubes, there are 3x blue cubes. And therefore, there are 5*3x green cubes, or 15x green cubes. This means that the cubes are in a 1:3:15 ratio, or that for every 1 yellow cube, there are 3 blue and 15 green cubes.

Now we can find the probability of picking a yellow cube. Since there are 18 non-yellow cubes for every yellow cube, this means that there is a 1/19 possibility of picking a yellow cube.

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Answer:

2 solutions

Step-by-step explanation:

x^4-6x^2-7=0

Replace x^2 by y

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y^2-6y-7=0

D=b^2-4ac= (-6)^2-4*1*(-7)= 36+28=64

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y1=(-b-sqrtD)/2a=-2/2=-1

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3 years ago
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Step-by-step explanation:

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