Question

Five students each wrote an expression to represent the perimeter of the given rectangle. Terrell wrote this correct expression: (2x + 2x) + (5x + 5x) + (1 + 1). Circle the name of the student who wrote an incorrect expression. Explain why the expression is incorrect. Anya: 2x + 2x + 5x + 1 + 5x + 1 Katrin: 2(5x + 1) + 2x Luis 2(2x) + 2(5x + 1) Steve: 1 + 1 + x(2 + 2 + 5 + 5)​

Answer 1

Luis wrote an incorrect expression.

Explanation:

As per Terrell, the correct expression is (2x+2x) + (5x+5x) + (1+1) which is equal to 12x + 2

For you who got incorrect answer, the answer if you simplified it must be 12x + 2. Let's check:

Anya 2x+2x+5x+1+5x+1 =

12x + 2 [CORRECT]

Katrin 2(5x+1) + 2x

10x+2+2x

12x + 2 [CORRECT]

Luis 2(2x) + 2(5x+1)

4x+10x+2

14x + 2 [INCORRECT]

Steve 1+1+ x(2+2+5+5)

2+ x(12)

12x + 2 [CORRECT]