If 45 cookies will serve 15 students, how many cookies are needed for 30 students?

I think i have it but not sure

Because your numbers are simple in this question, you can look at it this way...

You know how many cookies are needed for 15 students but you need to fiqure out how many for 30 students. The ratio between 15 to 30 is a 1:2, AKA double. THis means that you can simply double the known number of cookies and it will give you the amount that you need for double the people.
Your answer is 90 cookies.

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Adefunkeadewoleid Adefunkeadewoleid · Answer 2

The above question has to do with proportionality, specifically direct proportionality.

Direct proportionality means when an item x is directly proportional to an item y. This is represented mathematically as:

x ∝ y

90 cookies will serve 45 students.

The number of cookies needed for 30 students is 90 cookies

From the above question,

45 cookies will serve 15 students

Hence,

15 students = 45 cookies

30 students = ?

Cross Multiply

30 students x 45 cookies / 15 students

= 90 cookies.

Therefore, 90 cookies will serve 45 students.

To learn more, visit the link below:

https://brainly.com/question/18536567