What is the ratio of the width that of this rectangle​

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Step-by-step explanation:

9:4

Step-by-step explanation:

in the question it says it is width to height. The height is 4 and the width is 9 so 9:4

In order to find the perimeter of a shape, you have to add up all of the sides. In a rectangle, there are 2 pairs of congruent sides.

So, we know that for this rectangle:
P=2(5x-2.25)+2(2.5x+8)

Now, we have to simplify:
P=(10x-4.5)+(5x+16)

Simplify that again, and you get:

Perimeter= 15x+11.5