4. The teachers want to know how many groups will be in the combined classes. What do you need to know to solve? 5. Find the number of groups in the combined classes. Write an equation for each step. Explain how the quantities are related.

ANSWER and EXPLANATION
4. Mrs. Bell and Mrs. Ridley's classes will be combined for the road trip and the combined class will be split into groups of 6.
To know how many groups will be in the combined class, we need to know the total number of students in the combined class by finding the sum of the students.
5. To find the number of groups, first, find the total number of students in the combined class:
[tex]\begin{gathered} 18+24 \\ \Rightarrow42 \end{gathered}[/tex]Next, divide the total number of students by the number of students in one group (6). That is:
[tex]\begin{gathered} \frac{42}{6} \\ \Rightarrow7\text{ groups} \end{gathered}[/tex]Hence, there will be 7 groups.