Welcome to Bytelearn!

Let’s check out your problem:

Tisha tried to evaluate an expression. Here is her work:$\newline$$490 \div 7^2 \times 9 - 2 \times 3$$\newline$$490 \div 49 \times 9 - 2 \times 3$ {Step $1$}$\newline$$10 \times 9 - 2 \times 3$ {Step $2$}$\newline$$90 - 2 \times 3$ {Step $3$}$\newline$$88 \times 3$ {Step $4$}$\newline$$264$ {Step $5$}$\newline$Is Tisha's work correct?$\newline$(A)No, Tisha made a mistake going from Step $1$ to Step $2$. Tisha should have multiplied $49$ and $9$ before dividing. The order of operations says to multiply before you divide.$\newline$(B)No, Tisha made a mistake going from Step $3$ to Step $4$. Tisha should have multiplied $2$ and $3$ before subtracting. The order of operations says to multiply before you subtract.$\newline$(C)Yes, Tisha's work is correct.