3 years ago

Which label on the cone below represents the radius

Mathematics

1 answer:

3241004551 [841]3 years ago

6 0

The answer for the label on the cone below that represents the radius is A

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Step-by-step explanation:

Let x be the number of brothers and y be the number of sisters in the family.

1. Each brother has x-1 brothers and y sisters. If each brother has as many sisters as brothers, then

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2. Each sister has y-1 sisters and x brothers. If each sister has twice as many brothers as she has sisters, then

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3. Solve the system of two equations:

$\left\{\begin{array}{l}x-1=y\\ \\2(y-1)=x\end{array}\right.\Rightarrow 2(y-1)-1=y,\\ \\2y-2-1=y,\\ \\2y-y=2+1,\\ \\y=3.$

Then

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