Domain is the x-coordinate and range is the y - coordinate
![\therefore \: domain = \{ - 5, \: - 2, \: 1, \: 2 \} \\ \\ \&\: range = \{ - 3, \: 1, \: 4, \: 5\}](https://tex.z-dn.net/?f=%20%5Ctherefore%20%5C%3A%20domain%20%3D%20%20%5C%7B%20-%205%2C%20%5C%3A%20%20-%202%2C%20%5C%3A%201%2C%20%5C%3A%202%20%5C%7D%20%5C%5C%20%20%5C%5C%20%5C%26%5C%3A%20range%20%3D%20%20%5C%7B%20%20-%203%2C%20%5C%3A%201%2C%20%5C%3A%204%2C%20%5C%3A%205%5C%7D)
She is not correct, since the combined length of both boards is more than 2 feet
All you have to do is add up the side lengths we already know then subtract by the perimeter.
60.3 is the side lengths all together that we know
82-60.3=21.7
Hope this helped!!
Answer:
Leaving as a radical form
Why?
Because that's the whole value if you convert it to a decimal you cannot write all the numbers, and in the radical form it has all the numbers
It would be useful when we are working with equations for example the quadratic equation, if you get that x=√5, you would want the exact value. And there are more useful
The answer is 1/7n + 32/21