The elves and reindeer are getting ready for a meeting with Santa.
1 answer:
Let and
be the number of elves and reindeers, respectively.
We know that:
(so far 14 of them have arrived)
(each reindeer has 4 legs and each elf has two)
If we multiply the first equation by 2 we have , and if we subtract this equation from the second we have
which implies
.
So, there are 5 reindeers and 9 elves (remember that they have to sum up to 14).
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Divide 3 apples by $2.50 to get the unit price, $1.20 (The constant of proportionality)
Then multiply 12 apples by the constant ($1.20)
Your final answer should be $14.40
