Final answer:
To express the length of a string in yards (L_yards) when given its length in inches (x), the formula is L_yards = x / 36, since there are 36 inches in a yard.
Step-by-step explanation:
To write an expression that represents the length of a string in yards in terms of the string's length, x, in inches, we need to use the fact that there are 36 inches in a yard. Therefore, to convert inches to yards, we divide the number of inches by 36.
The expression to represent the length in yards (L_yards) in terms of inches (x) would be:
L_yards = x / 36
This expression can be used to calculate the length of an object in yards when its length in inches is known.