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The school that Maria goes to is selling tickets to a musical performance. On the first day of tickets sale the school sold 10 adult tickets and 3 child tickets for a total of $245. The school took in $115 on the second day by selling 5 adult tickets and 1 child ticket,

Respuesta :

Kuroi

Answer:

Adult tickets cost $20, child tickets cost $15

Step-by-step explanation:

I'm going to assume that we have to say how much the tickets cost

x- cost of an adult ticket

y- cost of a child ticket

[tex]\left \{ {{10x+3y=245} \atop {5x+y=115}} \right.[/tex]

[tex]\left \{ {{10x+3y=245} \atop {y=115-5x}} \right.[/tex]

10x+3(115-5x)=245

10x+345-15x=245

-5x=-100

x=20

y=115-5*20=15

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