3 years ago

Charlene's grandad is three times as old as her.He is 78 years old. How old is Barney?

Mathematics

2 answers:

belka [17]3 years ago

8 0

Barney is 26 years old

Leya [2.2K]3 years ago

6 0

GIGIGIGIIGIGIGIGIGIITIHSBABSBRVGWHA 26

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erastovalidia [21]

All you need is the double angle identity:

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So we have

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Apply the identity again to the squared term:

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lapo4ka [179]

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Hope this helps

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Charlene's grandad is three times as old as her.He is 78 years old. How old is Barney?​

Charlene's grandad is three times as old as her.He is 78 years old. How old is Barney?