media service charges $40 for a phone and $20/month for it economy plan .the equation c=20t=40 describes the total cost c,of operating a media service phone for t month

Question

anonymous · Answer

What exactly is the question?

anonymous · Answer

the total cost for 4 month of service is ?

anonymous · Answer

$120

anonymous · Answer

if a customer has only $90 available how many months of service can she receive

anonymous · Answer

2 months, 20*2=40. 40+40=80.

anonymous · Answer

After the 120 do i need to put 120t

anonymous · Answer

No, cus then t=1. not the case.... Are you plugging it into the equation?

anonymous · Answer

Your equation is faulty. if the total cost is c, then the equation should be c = 40 + 20t.