Question

Ava is building a rectangular sandbox a model of the sandbox dimensions are shown which expression represents the perimeter of Ava’s sandbox

Answer 1

Answer:

Option E: $12x+28$

Step-by-step explanation:

You need to remember that the perimeter of a rectangle can be calculated with the following formula:

$P=2l+2w$

Where "l" is the lenght of the rectangle and "w" is the width of the rectangle.

In this case, you can identify from the figure that:

$l=3x+14\\w=3x$

So, knonwing this, you can write the following expression to represent the perimeter of the rectangle:

$2(3x+14)+2(3x)$

The final step is to simplify the expression. Then you get:

$=6x+28+6x=12x+28$

This matches with the Option E.