Math  /  Numbers & Operations

Question.5 Unit rates 2NB2 N B
Audrey read a total of 26 books over 13 months. If Audrey has read 40 books so far, how many months has she been with her book club? Solve using unit rates. \square months submit

Studdy Solution

STEP 1

What is this asking? If Audrey reads at a steady pace, and it took her 13 months to read 26 books, how many months did it take her to read 40 books? Watch out! Don't mix up the number of books with the number of months!
Keep your units straight!

STEP 2

1. Calculate Audrey's reading rate.
2. Calculate the time it took Audrey to read 40 books.

STEP 3

We're given that Audrey read **26 books** in **13 months**.
To find her reading rate, we'll **divide** the **number of books** by the **number of months**.
This tells us how many books she reads *per month*.
It's like figuring out how many miles per hour a car travels!

STEP 4

26 books13 months=213 books113 months=2 books1 month \frac{26 \text{ books}}{13 \text{ months}} = \frac{2 \cdot 13 \text{ books}}{1 \cdot 13 \text{ months}} = \frac{2 \text{ books}}{1 \text{ month}} So, Audrey's reading rate is **2 books per month**!

STEP 5

Now, we know Audrey reads **2 books** every **month**, and we want to know how long it took her to read **40 books**.
We can set up a proportion!

STEP 6

Let mm be the number of months it took Audrey to read 40 books.
We can write the proportion: 2 books1 month=40 booksm months \frac{2 \text{ books}}{1 \text{ month}} = \frac{40 \text{ books}}{m \text{ months}}

STEP 7

To solve for mm, we can **cross-multiply**: 2m=401 2 \cdot m = 40 \cdot 1 2m=40 2m = 40

STEP 8

Now, we want to **isolate** mm.
Since mm is being multiplied by **2**, we'll **divide both sides** of the equation by **2**: 2m2=402 \frac{2m}{2} = \frac{40}{2} m=20 m = 20

STEP 9

So, it took Audrey **20 months** to read 40 books!

STEP 10

It took Audrey **20 months** to read 40 books.

Was this helpful?

Studdy solves anything!

banner

Start learning now

Download Studdy AI Tutor now. Learn with ease and get all help you need to be successful at school.

ParentsInfluencer programContactPolicyTerms
TwitterInstagramFacebookTikTokDiscord