A^2 + B^2=C^2 so there for the hypotenuse (13^2) - (5^2) will give you the last side
9514 1404 393
Answer:
x ≈ 2.87
Step-by-step explanation:
We can subtract 6 to put the equation into a form easily solved.
x^2 +2x +1 = 15
(x +1)^2 = 15
x +1 = √15 . . . . . for the greatest solution, we only need the positive root
x = √15 -1 ≈ 2.87
I believe it is D, stratified random sampling.
Hope this helps!!