25. At the age of two years, a cat or a dog is considered 24 "human" years old. Each year after age 2 is equivalent to 4 "human" years. Fill in the expression [24 + ____( a-2)] so that it represents the age of a cat or a dog in human years. Also, determine for what ‘a’ stands for. Copy the chart and use your expression to complete it.
Answers
Given : At the age of two years, a cat or a dog is considered 24 "human" years old . Each year after age 2 is equivalent to 4 "human" years.
To find : Fill in the expression [24 + ____( a-2)] so that it represents the age of a cat or a dog in human years.
Solution:
Cat age Human years
2 24
2 + 1 = 3 24 + 4 = 28 = 24 + 4(1) = 24 + 4(3 - 2)
3 + 1 = 4 28 + 4 = 32 = 24 + 4(2) = 24 + 4(4 - 2)
24 + 4(a - 2) is the age of cat of dog in human years
where a is the age of cat or dog
Cat / Dog Age Human age 24 + 4(a - 2)
2 24
3 28
4 32
5 36
6 40
7 44
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