+1/31 and -1/31
Hope this helps.
The Pythagorean theorem tells you
... a² + b² = c²
so
... a² = c² - b² = 16² - 9² = 256-81 = 175
... a = √175 = √(25·7)
... a = 5√7
Yes because 10 squares is 100 6*20 = 120 which is more than 100
The answer is x=-9 and y=5