Monday

April 21, 2014

April 21, 2014

Posted by **Anonymous** on Sunday, September 19, 2010 at 8:39pm.

C(t)=

use the model to find the total cost for 3 months of service

total cost=

- math -
**Sabrina**, Sunday, September 19, 2010 at 9:32pmI'm using 'x' instead of '+' to make the answer less confusing.

The cost for the phone is $30, and that's a one time charge.

The cost for x months would be 20 times x, or 20x

So, the model for the total cost is C(x) = 30 + 20x.

x= 30 + 20(1)= 50

x= 30 + 20(3)= 90

If x = 1 month, the cost would be $50. For three months, it would be $90, and so forth.

**Related Questions**

Math - Media service charges $20 for a phone and $30/month for its economy plan...

Math - Media service charges $20 for a phone and $30/month for its economy plan...

matt - Media Services charge $30 for a phone and $20/month for its economy plan...

algebra - help please im on my final exam for algebra and i need to pass this is...

Algebra/Equations,functions - Media services charges $40 for a phone and 20/mth ...

algebra - media service charges $20 for a phone and $30/month for its economy ...

math-word problem - Media Services charge $20 for a phone and $30/month for its ...

math - don't know where to start or end! charges $20 for a phone and $30/month ...

Math 116 - 1.Write an equation of the line containing the given points and ...

Math 116 - 1.Write an equation of the line containing the given points and ...