There are 21 males in the algebra 1 class. If 75% is female, how many students are there in the class?

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03-11-2014
Mathematics

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There are 21 males in the algebra 1 class. If 75% is female, how many students are there in the class?

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-3x - 9y = 18 4x + 3y = 12

luana luana · Answer 1 · 2014-11-03T00:49:14+01:00

luana luana

03-11-2014

[tex]x-\ female\\\\ y-all\ students\\\\ z=21\\ x=0,75y\\\\ x+z=y\\ 0,75y+21=y\ \ \ |subtract\ 0,75y\\ 21=0,25y\ \ \ | divide\ by\ 0,25\\y=84\\\\There\ are\ 84\ students\ in\ class.[/tex]

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