Answer:
(4,2.5)
Step-by-step explanation:
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
Answer:
A
Step-by-step explanation:
i think you might want to wait for other people because i dont know for sure