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:
i think C. 0.06 is answer
Step-by-step explanation:
6% = 6/100 = 0.06
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The diamond is 1 the square is 6 and the triangle is 7