Answer:
4+11x+15
Step-by-step explanation:
2×2=4 and 6x+5x=11× therefore 15 is left alone
You can find “hypotenuse” using Pythagorean to get the length of one of those steps, 12.5, and you get 150 when you multiply that number by 12 for each of the 12 steps
The answer is 4 :)
hope it helps!! sorry if the answer is wrong