C) it is a closed figure made up of straight lines.
With some simple rearrangement, we can rewrite the numerator as

Then factorizing the difference of squares,
, we end up with

Answer:
b) 9
Step-by-step explanation:
9 squared + 40 squared = 41 squared, which follows Pythagorean theorem.
Answer:
3
Step-by-step explanation:
22-4 =18
2x3=6
18÷6=3
Remember to use the PEMDAS order of operation
Parenthesis, Exponent, Multiply, Divide, Add, Subtract :)