Spencer would be the correct one because it's easier to keep your variables positive when trying to solve. Therefore, in order to keep the variable positive, one would have to add 4x to both sides.
I don't have the ranges of numbers to see which range so clearly it's impossible to answer
Answer:
The first obe
Step-by-step explanation:
Answer: 
Required theorem:
Pythagorean theorem = 
In other words, one side length squared + another side length squared = the middle lined squared.
Step-by-step explanation:

We can only have a positive distance so your final answer is :
