The number of plates being used by Mr.Martin are 4
Solution:
According to question Martin buys total 36 muffins for a class Breakfast which he places them on the plates in such a way that there are 9 muffins on each plate
We have to determine the number of plates used by Mr. Martin to do this
Let the number of plate being used be denoted by ‘n’
![\text { Total muffins }=\text { Number of plates } * \text { Muffins on each plate }](https://img.qammunity.org/2020/formulas/mathematics/middle-school/yepkyqtwxs6pkgwl20xhawc6r6iguuftfu.png)
![\begin{array}{l}{36=n * 9} \\\\ {n=(36)/(9)=4}\end{array}](https://img.qammunity.org/2020/formulas/mathematics/middle-school/5ujs2k31g9k9up3vmblsx6t4yh031okraz.png)
Hence the number of plates being used are 4