<h2>
Answer:</h2>
<em>Domain:</em> (−∞,∞) , {x|x∈R}
<h2>
explanation:</h2>
The domain of the expression is all real numbers except where the expression is undefined. In this case, there is no real number that makes the expression undefined.
<u><em>Interval Notation:</em></u>
(−∞,∞)
<u><em>Set-Builder Notation:</em></u>
{x|x∈R}
i hope this helped. please give brainliest if it did!
Answer:
If the perimeter of the rectangle is 30cm , find its area. W=5 FOR THE WIDTH. 5*10=50 FOR THE AREA.
Step-by-step explanation:
I hope you can read this, and I hope you understand how I did 7. I probably overworked it, and it was possibly a simpler way to get it.
Using Pythagoras in the first question
c=

which is approximately 16.5
for the second question
we also use Pythagoras
