Suppose that it costs $40 to place a classified advertisement in the newspaper, plus $2 for each line. then the cost to place an ad x lines long is given by y dollars, where. y=2x+40.

An order pair is expressed as (x, y)
so if x represent lines, and there are 15 lines
then x = 15
and if y represents dollars, and there are 70 dollars
then y = 70
which you would plug into (x, y) to get the ordered pair ( 15, 70 )
Now express as an ordered pair the fact that an ad costing $60 is 10 lines long

Ithink your answer is c hope that

First, think of what you know. you know that the number t the end of the equation will need to be subtracted because it is the money he lost from buying the lawn mower. and your first two weeks have negative profit, so that tells you that c and d are wrong. now you can plug any of the weeks into a and b to see which one works. i'll start with plugging week 1 into a.this isn't right because it says your answer for week one should be -90.so now we need to try the same thing with b.this one got you the right answer, (sometimes if you only check with one of the weeks multiple will work so you need to check with more of the weeks, but it worked out fine here)this means that b is the correct answer.let me know if you need more clarification. i hope this : )