Question

Jane’s cell phone plan is $40 each month plus $0.15 per minute for each minute over 200 minutes of call time. Janes cell phone bill last month was $58.00. What equation can be used to determine the number of minutes over 200 that Jane was billed?

Answer 1

Answer:

The equation is $40+0.15m = 58.00$ whose solution is $m =120\:minutes.$

Step-by-step explanation:

Let us call $m$ the number of minutes the phone is used over 200 minutes, then we have

$\boxed{40+0.15m = 58.00}$ (this says monthly bill of $40 plus the cost of phone usage over 200 minutes must equal $58 )

This equation can be used to solve for  $m$ u as follows:

$0.15m = 58-40$

$m = \dfrac{18}{0.15}$

$\boxed{m = 120\:minutes}$