I THINK the answer is compatible numbers.............. but I'm pretty sure it is compatible numbers
J would have to say that the answer is d. im sorry if im wrong.
Answer:
Since r is the distance from the origin to (x,y), it is the magnitude r=√x2+y2. Alternatively, from the equation (1), one can calculate directly that x2+y2=r2cos2θ+r2sin2θ=r2(cos2θ+sin2θ)=r2.
Step-by-step explanation:

.... Hope this will help....
3x=9
X=3
This means that eqch can contains 3 balls