Express this system as a constant coefficient linear differential equation in standard operator form. (b) Determine the characteristic modes of this system

At the newest animated movie, for every 9 children, there are 4 adults. there are a total of 39 children and adults at the movie.

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Celeste wants to have her hair cut and permed and also go to lunch. she knows she will need $50. the perm cost twice as much as her haircut and she needs $5 for lunch. how much does the perm cost?