30.2k views
3 votes
A phone company offers two monthly plans. Plan A costs $20 plus an additional $0.12 for each minute of calls. Plan B has no initial fee but costs $0.16 for each minute of calls. For what amount of calling do the two plans cost the same? _minutes What is the cost when the two plans cost the same? $_

1 Answer

3 votes

In this case, we'll have to carry out several steps to find the solution.

Step 01:

Data

Plan A

$20

$0.12 per minute

Plan B

$0

$0.16 per minute

Two plans cost the same:

time = ?

cost = ?

Step 02:

x = time (minutes)

y = cost ($)

Plan A

ya = 0.12x + 20

Plan B

yb = 0.16x + 0

Two plans cost the same: ya = yb

0.12x + 20 = 0.16x

20 = 0.16x - 0.12x

20 = 0.04x

20 / 0.04 = x

500 = x

yb = 0.16 * 500 = 80

The solution is:

The two plans cost the same when they reach 500min and the cost is $80.

User Pavan Kumar
by
8.4k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories