Answer:

Step-by-step explanation:
25= r•r•8 ⇔ 25/8 = r²
then

ANSWER

EXPLANATION
The first equation is

The second equation is

We want to eliminate y, so we multiply the first equation by



We now subtract equation (3) from (2)



Multiply both sides by



Substitute into the first equation to solve for x .

Multiply to obtain



Multiply both sides by 2.


The solution is

The dimensions are 8 ft x 8 ft.
The total area is 64 sq ft.
The dimensions of a single tile are 2 1/2 x 1 1/2
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rational numbers can be written as a ratio of two integers a/b
1/2 is the ratio of 1 and 2 so its rational
√7/10 is not a ratio of two integers so its irrational
3π/4 is not a ratio of two integers so its irrational
5/9 is the ratio of 5 and 9 so its rational
18 is 18/1 and is the ratio of 18 and 1 so its rational