Milk is sold in four sizes. Which is the better buy? * 250 mL for $0.50

500 mL for $1.10

1L for $1.80

2L for $3.90

$5.829929999

Step-by-step explanation:

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if you are saying purchasing 3 social media ads and one newspaper ad counts as one purchase then there are:

6 purchases

if you are asking how many of each then:

18 social media ads

6 newspaper ads

thus, the first answer choice, y = sec x, is the correct one