On chatty cathy’s cell phone plan she pays for minutes used plus a fixed monthly charge. for 500 minutes she pays $35 total, and for 1500 minutes used she pays $55 total. what is her monthly fixed charge? a) $15 b) $20 c) $25 d) $30

Option 'C' is correct.

Step-by-step explanation:

Let the fixed monthly charges be x

Let the charges per minutes be y

According to question, we have

Now, by using the method of substitution  for solving the system of linear equation:

Now, put the value of y in x , so we get,

Hence, the monthly fixed charge is $25

Thus, Option 'C' is correct.

no

step-by-step explanation:

answer