Answer:

Explanation:
We have been given that Each student must use at least 9 toothpicks for the project. Her class has 30 students.
First of all, we will find the total number of toothpicks needed for 30 students by multiplying 30 by 9 that is
.
Mrs. Wendel knows that there is already a bag of 50 toothpicks in the class storage room. She plans to buy x additional toothpicks this afternoon to make sure her class will have enough.
So the total number of toothpicks that Mrs. Wendel has would be
.
The number of total amount of sticks Mrs. Wendel has, should be greater than or equal to 270.

Therefore, our required inequality would be
.