The students in the middle school are younger than 15 years old. Use y to represent the age of students in the middle school.

0<y<15 or y<15

Step-by-step explanation:

y is the students. and the ages are less than 15.

on monday rodney ate 1/4th of the sandwich = 3/12

on tuesday he ate 1/3rd of the sandwich = 4/12

therefore in total he has eaten = 3/12 + 4/12 = 7/12

thus we can say that he has eaten 7/12 of the sandwich on monday and tuesday alltogether.

happy to

pls mark as brainliest.