Your phone plan charges initial fee of $40 plus $.50 per minute .if. Your bill last month was $140 how mich minutes did you use?

Question

How many minutes were used?

Answer 1

m = # of minutes used

Bill = 40 + 0.5*m

140 = 40 + 0.5m

140 - 40 = 0.5m

100 = 0.5m

100 / 0.5 = m

200 = m

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Always check your work!

140 = 40 + 0.5m

140 = 40 + 0.5 (200)

140 = 40 + 100

140 = 140 CORRECT