Answer:
√841
Step-by-step explanation:
You would use pythagorean theorem to solve this problem:
a² + b² = c²
a = 20 b = 21
20² + 21² = 400 + 441 = 841
√841
Answer:
2n+13
Step-by-step explanation:

Answer:
3136
Step-by-step explanation:
Thats the answer please I don't have time to write the explanation
The slope should be one over two.
The greatest common factor of 40&10 is 10