The number of dogs and chickens on a farm add up to 12. The number of legs between them is 30. How many dogs and how many chickens are on the farm if there are at least twice as many chickens as dogs?

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for

step-by-step explanation:

we can analyze the pattern at which the terms increase. let us denote , , , so that we can call

note the following:

the pattern: to get the next term value, we just add the next term number (e.g. 1st, 2nd, to the previous term value (term values are the given numbers in the question, 1, 3, 6, 10, 15,

from , to get to , we add

from , to get to , we add

etc.

we need to form a recursive formula, a formula that has the next term as a function of the previous term. so a possible recursive formula can be

, and for

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step-by-step explanation:

486in is correct

step-by-step explanation:

365

step-by-step explanation: