Morgan writes the expression
5(2 + 1) 2 + 3 on the board.

Mr. Dolezal says the first step is to evaluate 12. Explain Mr. Dolezal’s mistake. Then, evaluate the expression.

He didn’t follow PEMDAS which is the an acronym for the order of operations. according to pemdas the first step is parenthesis (which is the p in pemdas) there fore the first step is to add the 1 and the 2
then since there are no exponents you multiply so you multiple 5(3) which is 15
then you can add all the number left to right
so 15+2+3= 20
so the answer is 20
hope this helped
let me know if you have any questions

I'm not sure exactly but my best guess would be 1/4