Answer:
Cecilia's answer is 12 which is incorrect. The correct answer is 26.
Step-by-step explanation:
Given:
Prof. Schaben asks her students to simplify this expression:
21 space plus space 15 space divided by space 3.
Cecilia's answer is 12.
Now, to find whether the answer is correct or not.
As the expression given:
21 space plus space 15 space divided by space 3.
21 + 15 ÷ 3.
So, we solve it by using the PEMDAS rule:
According to P E M D A S first is division then addition.
Thus, the solution will be as:
[tex]21\ +\ 15\ \div\ 3.[/tex]
[tex]=21\ +\ 5.[/tex]
[tex]=26.[/tex]
Hence, the correct answer is 26.
Therefore, Cecilia's answer is 12 which is incorrect. The correct answer is 26.
