Question

Suppose that if 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 is given by y dollars, where y = 2x + 40. Express as an ordered pair the fact that a 15 line ad costs $70.

Answer 1

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 )

Answer 2

Now express as an ordered pair the fact that an ad costing $60 is 10 lines long

Answer 3

same idea :)
if x = lines = 10
and y = dollars = 60
then for ordered pair (x, y) plug in :) (give it a try)

Answer 4

(10 , 60)

Answer 5

correct! :D

Answer 6

Thanks Bro!!!

Answer 7

you're welcome :)