hernandezblanca hernandezblanca

19-07-2017
Mathematics

contestada

A certain mail service charges $15 for an overnight package, plus 18 cents per pound. Find the cost of mailing a 40-pound package through this company.

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sparkmushroom22 sparkmushroom22

19-07-2017

cost = $15 + $ .18x

y = .18 (40) + 15
y = 7.2 + 15
y = 22.2

so the answer is $22.20

check:

22.20 = .18x + 15
7.2 = .18x
x = 40

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