Respuesta :
Answer:
They were charged 300 minutes of phone calls.
Step-by-step explanation:
$30.35 was the monthly charge for this service provider. Subtract that from the $45.35 which would leave $15. $15 divided by $.05 = 300. 300 minutes is your answer.
Y=0.05x + 30.35
Plug in $45.35 for y and solve for x(minutes)
43.35=0.05x + 30.35
X = 600 minutes
Plug in $45.35 for y and solve for x(minutes)
43.35=0.05x + 30.35
X = 600 minutes