Question 1123330
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<U>One approach</U> is to solve the system of two equations in two unknowns


 C +    A =  250     dinners    (1)   (counting dinners;  C = # of child;  A = # of adults)
9C + 5.5A = 1935     dollars    (2)   ( counting dollars)


You can solve it using the Substitution method. For it, express C = 250-A  from eq(1) and then substitute into eq(2).
You will get

9*(250-A) + 5.5A = 1935.


Simplify and solve for C.  
When you find C, evaluate A = 250-C.


The rest is simple arithmetic, which I leave to you.



<U>Another approach</U> is to start directly from one single equation 

9*(250-A) + 5.5A = 1935.


It also has simple interpretation.


Again, simplify and solve for C.  
When you find C, evaluate A = 250-C.


The rest is simple arithmetic, which I leave to you.
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