Mis Harding

Mis Harding will change her tiles; the yards are 2 1/2 yards and 2 1/2 yards on the side. What is her area
A 6 1/4
B 4 1/2
C 8 1/2
D 5 1/4

Correct answer:

x = A

Step-by-step explanation:

$$\begin{gathered} a=2\frac{1}{2}=2+\frac{1}{2}=\frac{2\cdot 2+1}{2}=\frac{4+1}{2}=\frac{5}{2}=2\frac{1}{2}=2.5\text{yd} \\ A=a\cdot a=\frac{5}{2}\cdot \frac{5}{2}=\frac{5\cdot 5}{2\cdot 2}=\frac{25}{4}=6.25{\text{yd}}^2 \\ x=A \end{gathered}$$

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