A cellbphone company charges $10 per month for up to 500 text messages and $0.15 for each additional text message. Stanley was charged $14.50 last month for text messages.
2 answers
10 + .15(n-500) = 14.50
X text messages.
10 + 0.15x = 14.50.
X = 30.
10 + 0.15x = 14.50.
X = 30.
8 answers