To find the cost of the fence around Mr. Rodriguez's vegetable garden, we can evaluate the expression \( 7(l + 2w) \) using the given measurements for length and width.
Given:
- Length \( l = 5 \) yards
- Width \( w = 2 \) yards
Now, we substitute the values into the expression:
\[ l + 2w = 5 + 2(2) = 5 + 4 = 9 \]
Next, we can multiply this by 7 to find the total cost:
\[ 7(l + 2w) = 7(9) = 63 \]
Therefore, the cost for the materials for the fence is $63.
So the correct response is:
$63