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bevanscory123
13.11.2019 •
Mathematics
Twelve books cost $59.88 and
21 books cost $104.79. is there is a
constant of proportionality between
these purchases? explain.
Solved
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Ответ:
Yes there is, and it is 4.99.
Step-by-step explanation:
The constant of proportionality (let's call it
) will relate the number of books bought
and their cost
in the following way:
For the 12 books:
And for the 21 books:
The
for the two purchases is the same, thus there is a constant of proportionality between the two purchases.
P.S:
is the price per book.
Ответ: