Look at the image to answer.

Yes

Step-by-step explanation:

Given that the area of the square floor is 400, we can find the side length because A = x^2 = 400. So, the side length is just the square root of 400 = 20.

Now, we are increasing the length of each side by 21 so that now the dimensions are 21 ft by 21 ft. We multiply these to get the area: 21 * 21 = 441.

Rational numbers are those that can be written in the form p/q, where q ≠ 0. Here, we can write 441 as 441/1, so yes, the new area is a rational number.

Hope this helps!

step-by-step explanation:

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this linear equation would have just one solution.

step-by-step explanation:

the reason why this would have one solution is that it is an expression with just one variable. since that variable is not raised to a power, it will always have just one solution.