Explanation:
The committee should sell adult tickets for $10 and child tickets for $5 to raise $1,440 from ticket sales.
Let x be the price of adult tickets in dollars and y be the price of child tickets in dollars. We can set up the following system of equations to represent the given information:
x + y = 300 (the total number of tickets sold)
180x + 120y = 1440 (the total amount of money raised)
x = 2y (the price of adult tickets is twice the price of child tickets)
Substituting the third equation into the first equation, we get:
2y + y = 300
3y = 300
y = 100
Substituting this value for y into the third equation, we get:
x = 2*100
x = 200
Substituting these values for x and y into the second equation, we get:
180200 + 120100 = 1440
This equation is true, so the solution x = $200 and y = $100 is valid. Therefore, the committee should sell adult tickets for $10 and child tickets for $5 to raise $1,440 from ticket sales.