Danny has at least $15 more than his big brother.Danny's big brother has $72.How much money does Danny have?Write an inequality to solve each problem

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26-01-2015
Mathematics

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Danny has at least $15 more than his big brother.Danny's big brother has $72.How much money does Danny have?Write an inequality to solve each problem

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thisisbenmanley thisisbenmanley · Answer 1 · 2015-01-26T21:04:04-05:00

thisisbenmanley thisisbenmanley

26-01-2015

If Danny has AT LEAST $15 dollars more than his brother, and his brother has $72, then the equality would start out like this (where d = the amount of money Danny has):

[tex]d\ge72+15[/tex]

Because he has AT LEAST $15 more; it could be exactly 15, or it could be any number more than 15. So, to simplify:

[tex]d\ge72+15\\d\ge87[/tex]

Danny has at least $87 ($87 or more).

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