Answer:
4y
Step-by-step explanation:
The perimeter means the sum of all sides. A square has four equal sides, and we know each side is "y".
y + y + y + y
Then simplify that expression. Collect like terms, which are numbers with the same variables. All of them are "y", so combine them by adding.
y + y + y + y
4y Simplified expression
Remember an expression means there is no equal sign.
P = 4y is an incorrect answer.
That would be an equation.
