Simplify.
$\frac{5^{2} + 2^{2} - 1^{2}}{8 \div 2 \cdot 9 \cdot 1 \div 9}$
Select the correct choice below and, if necessary, fill in the answer box to complete your choic
A. $\frac{5^{2} + 2^{2} - 1^{2}}{8 \div 2 \cdot 9 \cdot 1 \div 9} =$
B. The expression is undefined.

Answer

Expert–verified

Hide Steps

Answer

Final Answer: $7$

Steps

Step 1 ：Simplify the numerator: $5^{2} + 2^{2} - 1^{2} = 25 + 4 - 1 = 28$

Step 2 ：Simplify the denominator: $8 \div 2 \cdot 9 \cdot 1 \div 9 = 4 \cdot 9 \cdot 1 \div 9 = 4$

Step 3 ：Divide the numerator by the denominator: $\frac{28}{4} = 7$

Step 4 ：Final Answer: $7$