math

posted by .

media service charges \$30 for a phone and \$20 month for its economy plan. find a model that determines the total cost,C(t) of operating a media services phone for 1 months
C(t)=

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

total cost=

• math -

I'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.

Similar Questions

1. Math

Media service charges \$20 for a phone and \$30/month for its economy plan. The equation c=30t +20 describes the total cost,c, of operating Media Services phone for t months. The total cost for 4 months of service is \$140?
2. Algebra

Another question: A cell phone company charges \$60 for a cell phone and \$40 per month under its economy plan. Formulate and graph a model that can be used to determine the total cost, C(t), of operating a cell phone for t months. Find …
3. algebra

help please im on my final exam for algebra and i need to pass this is the second time taking it. media services charges \$20 for a phone and \$30 a month for itd economy plan. the equation c=30t+20 describes the total cost c, of operating …
4. math-word problem

Media Services charge \$20 for a phone and \$30/month for its economy plan. The equation C=30t +20 describes the total cost, C of operating a media service phone for t months. The total cost for 10 months of service is... My answer is …
5. Math

Media service charges \$20 for a phone and \$30/month for its economy plan. The equation c=30t +20 describes the total cost,c, of operating Media Services phone for t months. A) The total cost for 8 months of service is?
6. algebra

media service charges \$20 for a phone and \$30/month for its economy plan. The equation C =30t + 20 decribes the total cost, C of operating a media service phone for t months. The total cost for two months of srvice is \$_______.?
7. Algebra/Word problem

media services charges \$20 for a phone and \$30/month for its economy plan. what is the total cost for 10 months service C(t)= 30t +20= total cost is \$500 for 10 months?
8. math

don't know where to start or end! charges \$20 for a phone and \$30/month for its economy plan. The equation C =30t + 20 describes the total cost, C of operating a media service phone for t months. The total cost for 10 months of service …
9. matt

Media Services charge \$30 for a phone and \$20/month for its economy plan. The equation c=20t+30 describes the total cost, c, of operating a Media Services phone for t months. The total cost for 7 months of service is?
10. Algebra/Equations,functions

Media services charges \$40 for a phone and 20/mth for its economy plan. It says to find a model that determines the total cost, C(t), of operationg a media Services phone for t months. I think the answer should be in this equation …

More Similar Questions