Lea is reading a book that is 165 pages. She reads 15 pages each day. Which equation can be used to determine the number of days, it will take Lea to finish reading the book?
A: d + 15 = 165
B: 165 = d/15
C: 15d = 165
D: 165 = 15 - d
To determine the number of days it will take Lea to finish reading the book, we need to set up an equation.
Let's break down the information given in the question:
- Lea reads 15 pages each day.
- The book has a total of 165 pages.
To find the number of days it will take Lea to finish reading the book, we can set up the equation:
Number of days * Number of pages read each day = Total number of pages in the book
Let's assign the number of days to the variable 'd':
d * 15 = 165
Now let's take a look at the answer choices:
A: d + 15 = 165 - This equation attempts to find the number of days by adding 15 to d, but it doesn't take into account the number of pages read each day. This equation is incorrect.
B: 165 = d/15 - This equation attempts to find the number of days by dividing 165 by 15, but it doesn't take into account the number of pages read each day. This equation is incorrect.
C: 15d = 165 - This equation correctly represents the number of days (d) multiplied by the number of pages read each day (15), equaling the total number of pages in the book (165). This equation is correct.
D: 165 = 15 - d - This equation attempts to find the number of days by subtracting d from 15, but it doesn't take into account the number of pages read each day. This equation is incorrect.
Therefore, the correct equation to determine the number of days it will take Lea to finish reading the book is:
C: 15d = 165