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9966 [12]
3 years ago
5

A dogs weighs 7 pounds and triples each year for two years. How much does the dog weigh?

Mathematics
2 answers:
Tanya [424]3 years ago
5 0
Year 1: 7lbs x 3years= 21lbs
Year 2: 21lbs x 3years = 63lbs
Viktor [21]3 years ago
4 0
7 pounds times 3 is 21 for the first year, and 21 times 3 is 63 for the second year. The answer is 63 pounds.

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Step-by-step explanation:

For any positive numbers a,b we always have the following identity:

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(gcd(a,b) denotes the greatest common divisor between a and b, and lcm(a,b) denotes the least common multiple between a and b)

In our case, we are given that a\cdot b = 44 and that lcm(a,b)=22. Plugging that in into our identity, we get:

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gcd(a,b)=\frac{44}{22}=2

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