Answer:
4 + 3x
Step-by-step explanation:
2 + 2 = 4
Add the three x's together and you get 3x!
Hope this helps! ^^
15 feet is what I came up with.
The first one is isolate the 2nd and 3rd wat r the examples
Answer:

Step-by-step explanation:
Let the number be
.






The number is 5.
20^2 + (x-8)^2 = x^2
x^2 = 400 + x^2 -16x + 64
16x = 464
x = 29 = hypotenuse
Double - Check
29^2 = 20^2 + 21^2
841 = 400 + 441