ChitChat wireless charges $0.30 per minute plus a monthly base fee. In september, Maggie used 120 minutes and her bill was $50. Write and solve an equation to find the cost if Maggie uses 165 minutes in october

Let $k = the monthly base fee.

The variable cost is $0.30 per minute.

Let

C = total cost in a month

x = minutes used

September:

x = 120 minutes

C = $50

Therefore

k + (0.30) (120) = 50

k + 36 = 50

k = $14

October:

x = 165 minutes

The cost is

C = 14 + (0.3) (165)

C = $63.5

Answer: $63.50