Posted by Lynn on .
Word problems confuse me >_>
You are choosing between two longdistance telephone companies. Company A charges $.09 per minute plus $4 monthly fee. Company B charges $.11 per minute with no monthly fee.
X = number of minutes you call long distance
y = total cost of long distance phone service.
How am I suppose to write two equations representing the cost of each company's service for one month?

Math  Word Problem 
Steve,
Just take each sentence and figure out what is says algebraically.
Company A: for x minutes, the charge is 9x + 400 cents
Company B: for x minutes, the charge is 11x with no extra fee.
So, which company is cheaper? That obviously will depend on the number of minutes you use.
So, when will A charge more than B?
9x + 400 > 11x
400 > 2x
200 > x
So, if you use less than 200 minutes, A charges more.
At 200 minutes,
9*200 + 400 = 1800+400 = $22.00
11*200 = $22.00
If using more than 200 minutes, A only charges an extra 4 cents/min, while B charges 11 cents/min, so A will be cheaper. 
Math  Word Problem 
mustanser,
The cell phone bill has a base fee of $30 per month plus twenty cents per minute.