Aroped-off area of width x is created around a 30- by 10-foot rectangular museum display of native american artifacts. the combined area of the display and the roped-off area is 800 square feet. whats an equation for the combined function

Step-by-step explanation:

1. You know that:

-  The roped-off area whose width is represented with x, it is created around  a rectangular museum.

- The dimensions of the rectangular museum are: 30 ft by 10 ft.

- The combined area of the display and the roped-off area is 800 ft².

2. The area of the rectangular museum can be calculated with:

Where is the lenght and is the width.

You have that the lenght and the width in feet are:

3. Let's call the width of the roped-off area. Then, the combined area is:

Where

4. Substitute values and simplify. Then:

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y=x+9

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step-by-step explanation: