fieryhusky3p4xfdm fieryhusky3p4xfdm

01-03-2018
Mathematics

contestada

Tilly the dog barks every 9 seconds.
Billy the dog barks every 12 seconds.
They both bark at the same time.

After how many seconds will they next bark at the same time?

Respuesta :

Аноним Аноним

01-03-2018

Aww... I have a dog named Tilly, *Ahem* It would take 36 seconds. Hope this helpz...

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jbakker jbakker

01-03-2018

For this question you need to find the Lowest Common Multiple (LCM) of 9 and 12. We do this by finding the prime factorization of each number.
9 = 3 x 3
12 = 3 x 4
The LCM is found by multiply the highest number of each factor.
LCM = 3 x 3 x 4 = 36.

Answer Link

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