High School

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Elam is packing his room to move into a new house. A small box can hold 8 books without breaking, while a large box can hold 12 books without breaking. He has at most 160 books to pack and fewer than 30 boxes total. Let [tex]$s$[/tex] represent the number of small boxes and [tex]$l$[/tex] represent the number of large boxes. The inequalities [tex]$s \geq 0$[/tex] and [tex]$l \geq 0$[/tex] are part of the system that models this scenario.

Which inequalities complete the system?

A. [tex]s - l < 30[/tex]
B. [tex]8s - 12l \leq 160[/tex]
C. [tex]s + l < 30[/tex]
D. [tex]8s + 12l \leq 160[/tex]
E. [tex]s + l > 30[/tex]
F. [tex]8s + 12l \leq 160[/tex]
G. [tex]s + l < 30[/tex]
H. [tex]8s + 12l \geq 160[/tex]

Answer :

To solve this problem, we need to set up a system of inequalities that models the packing of books into boxes.

Let's break it down step-by-step:

1. Variables Defined:
- Let [tex]\( s \)[/tex] represent the number of small boxes.
- Let [tex]\( l \)[/tex] represent the number of large boxes.

2. Constraints Based on the Problem:
- A small box can hold 8 books, while a large box can hold 12 books.
- Elam has at most 160 books to pack.
- There are fewer than 30 boxes in total.

3. Inequalities:

- Since you can't have a negative number of boxes, the first two inequalities are:
[tex]\[
s \geq 0
\][/tex]
[tex]\[
l \geq 0
\][/tex]

- The total number of boxes (small and large combined) is less than 30:
[tex]\[
s + l < 30
\][/tex]

- The total number of books packed, which includes books from both small and large boxes, cannot exceed 160:
[tex]\[
8s + 12l \leq 160
\][/tex]

These inequalities form a complete system that describes Elam's constraints for packing his books:

- [tex]\[ s \geq 0 \][/tex]
- [tex]\[ l \geq 0 \][/tex]
- [tex]\[ s + l < 30 \][/tex]
- [tex]\[ 8s + 12l \leq 160 \][/tex]

These inequalities account for the nonnegative number of boxes, the limit on the total number of books, and the total number of boxes available.

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Rewritten by : Barada