Answer:
148 feet
Step-by-step explanation:
Perimeter = Length + Length + Width + Width
542 feet = Length + Length + 123 feet + 123 feet
2 Lengths = 542 feet - 123 feet - 123 feet = 296
1 Length = [tex]296\ feet\div2=148\ feet[/tex]
The length of the yard is 148 feet.
