Posted by Amy on Sunday, March 7, 2010 at 2:15pm.
it cost $2 per day to place a oneline ad in the classifieds plus a flat service fee. one day cost $3 and four days cost $9.
write a linear equation that gives the cost in dollers, y, in terms of the nunber iof days,x.
find the cost of a sixday ad.

9th grade  Reiny, Sunday, March 7, 2010 at 2:34pm
Actually you have more information than is necessary.
"it cost $2 per day to place a oneline ad in the classifieds plus a flat service fee" > y = 2x + b
"one day cost $3 " > x = 1, y = 3
3 = 2(1) + b
b = 1
equation: y = 2x + 1
(check: 4 days cost $9,
y = 2(4) + 1 = 9, Check!
so for 6 days
y = 2(6) + 1 = $13
Answer This Question
Related Questions
 Math  The cost of staying at a hotel can be found using the function y = 129x...
 Honors Algebra  Hi, I need some help with my Algebra. This is how it goes: Yet ...
 Algebra  A car rental company charges $24 per day plus $0.75 per mile driven. a...
 geometry  a phone company charges a flat monthly fee of $15 for cell phone ...
 Math  Car Rentals charge 20 dollars per day plus a 10 dollar service charge to ...
 algebra2 (math)  The Cost of installing new kitchen cabinets is $150 for ...
 Math  A company manufactirung snowboards has fixed costs of $200 per day and ...
 MATH ALGEBRA (2ND TIME POSTING! ) Please Help!! :)  The Cost of installing new ...
 math  Antoine went on vacation. His room cost $115.62 each night. His flight ...
 math  A piano manufacturer has a daily fixed cost of $1200 and a marginal cost ...
More Related Questions