To evaluate the expression \(7(l + 2w)\), we need to substitute the given values of \(l\) (length) and \(w\) (width).
Given:
- \(l = 5\) yards
- \(w = 2\) yards
Now substituting these values into the expression:
\[ 7(l + 2w) = 7(5 + 2(2)) \]
First, calculate \(2w\):
\[ 2w = 2(2) = 4 \]
Now substituting this back into the equation:
\[ 7(5 + 4) = 7(9) \]
Now multiply:
\[ 7 \times 9 = 63 \]
Therefore, the cost for the garden is $63.
The correct response is: \[ \text{$63} \]