contestada

a total of 78 seats for a concert are sold,producing a total revenue of $538.there are two type of seats ,seat a cost $3 and seat b cost $11,how many of each seats were sold?

Respuesta :

takotakuna2003

Answer:

a=40

b=38

Step-by-step explanation:

Amount of Seat a - a

Amount of Seat b - b

[tex]a + b = 78 \\ 3a + 11b = 538[/tex]

3a+3b=234

3a+11b=538

8b= 304

b= 38

a=78-38=40

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