The answer is A!! Hope I helped
Answer:
and 
Step-by-step explanation:
Let
x -----> the number of polyphonic ringtones
y ----> the number of standard ringtones
we know that
-----> equation A
-----> equation B
Solve the system of equations by substitution
Substitute equation A in equation B and solve for y





Find the value of x
Perimeter of square is P = 4s.....s = length of 1 side
so ur function rule is : y = 4x
No, because 64 does not go into 180 evenly.