Answers:
580 minutes
$75.4
Step-by-step explanation:
Plan A cost $29 plus $0.08 per minute of call. So, if x is the number of minutes, the cost for plan A is
A = 29 + 0.08x
Plan B cost $0.13 for each minute, so the cost for plan B is
B = 0.13x
Then, to calculate the amount of calling that make both costs the same, we need to solve the following equation
A = B
29 + 0.08x = 0.13x
Solving for x, we get:
29 + 0.08x - 0.08x = 0.13x - 0.08x
29 = 0.05x
29/0.05 = 0.05x/0.05
580 = x
Therefore, the cost of A and B will be the same when the amount of calls is 580 minutes.
Finally, we can calculate the cost, replacing x = 580, so:
B = 0.13x
B = 0.13(580)
B = 75.4
So, the cost is $75.4