Answer:
The expression representing total number of juice boxes they bought is
![y=66x](https://img.qammunity.org/2021/formulas/mathematics/high-school/67uj64vcre0yog9cuzvgc3fztmx1g9jfsu.png)
Explanation:
Given:
Number of 6-packages of juice bought by Jamar = 8
Number of 6-packages of juice bought by grandmother = 3
We need to write an expression which models Total number of juice boxes they bought.
Solution:
Let the Total number of juice boxes they bought be represented by 'y'.
Also Let number of boxes in each package be 'x'.
1 package = x boxes
6 package = number of boxes in 6 package.
By using Unitary method we get;
number of boxes in 6 package =
![6x](https://img.qammunity.org/2021/formulas/mathematics/high-school/97rs8l897lo6olji0vkcdhob3i2x9l2noo.png)
Now we can say that;
Total number of juice boxes they bought will be equal to sum of Number of 6-packages of juice bought by Jamar multiplied by number of boxes in 6 package plus Number of 6-packages of juice bought by grandmother multiplied by number of boxes in 6 package.
framing in equation form we get;
![y=8* 6x +3* 6x\\\\y =48x+18x\\\\y=66x](https://img.qammunity.org/2021/formulas/mathematics/high-school/x3v2wakoureu69w7wd6y4v0shv06qxle4a.png)
Hence the expression representing total number of juice boxes they bought is
![y=66x](https://img.qammunity.org/2021/formulas/mathematics/high-school/67uj64vcre0yog9cuzvgc3fztmx1g9jfsu.png)