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21. The cost to mail a package is $5.00. Brian has postcard stamps that are worth $0.34 each and first class
stamps that are worth $0.49 each.
If Brian puts 7 first class stamps on the package, how many postcard stamps will be needed.

Sagot :

Maria23000984idn

Answer:

Okay so a couple key points

$5.00 to ship it

Postcard stamps = $0.34

First class stamps= $0.49

And lastly he has 7 first class stamps

So with that being said you take .49 and times it by 7 since he has seven of them and that would be $3.43

And now you take $3.49 and subtract it from the $5.00 you'd be left with $1.57

Now you take $.34 and divide it by $1.57 and you would get a total of 4.61 so that means you would need five postcard stamps

So to be able to ship the package you'd need 7 first class stamps and 5 postcard stamps

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