What is 89+27+11 using a mental math property

Which statement is true 1.the pythagorean theorem can be used to find the missing side of any triangle 2.the pythagorean theorem can be used to find the missing side of any polygon 3. the pythagorean theorem can be used to find the missing side of any right triangle 4.the pythagorean theorem can be used to find the missing side of any isosceles triangle

Solve -.016x= -16. need solving this

Xy x xy if a and b are positive integers such that a*b=9 and b*a=72 what is the value of a/b