Welcome to Bytelearn!

Let’s check out your problem:

Francesca tried to evaluate an expression. Here is her work:$\newline$$3(5)^2 - 18 \div 3$$\newline$$3(25) - 18 \div 3 \quad \{\text{Step 1}\}$$\newline$$75 - 18 \div 3 \quad \{\text{Step 2}\}$$\newline$$57 \div 3 \quad \{\text{Step 3}\}$$\newline$$19 \quad \{\text{Step 4}\}$$\newline$Is Francesca's work correct?$\newline$(A) No, Francesca made a mistake going from the given expression to Step $1$. Francesca should have multiplied $3$ and $5$ before evaluating the exponent. The order of operations says to perform operations inside parentheses before you evaluate the exponent.$\newline$(B) No, Francesca made a mistake going from Step $2$ to Step $3$. Francesca should have divided $18$ by $3$ before subtracting. The order of operations says to divide before you subtract.$\newline$(C) Yes, Francesca's work is correct.