Answer:
C. y<3
Step-by-step explanation:
We are required to determine the solution set of the inequality
[tex]15y-9<36[/tex]
Step 1: Add 9 to both sides
[tex]15y-9+9<36+9\\15y<45[/tex]
Step 2: Divide both sides by 15
[tex]15y \div 15<45 \div 15\\y < 3[/tex]
The solution set of the given inequality is: y<3.
The correct option is C.