A movie theater has a seating capacity of 143. The theater charges $5.00 for children, $7.00 for stu

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  1. math_celebrity

    math_celebrity Administrator Staff Member

    A movie theater has a seating capacity of 143. The theater charges $5.00 for children, $7.00 for students, and $12.00 of adults. There are half as many adults as there are children. If the total ticket sales was $ 1030, How many children, students, and adults attended?

    Let c be the number of children's tickets, s be the number of student's tickets, and a be the number of adult's tickets. We have 3 equations:
    1. a + c + s = 143
    2. a = 0.5c
    3. 12a + 5c + 7s =1030
    Substitute (2) into (1)
    0.5c + c + s = 143
    1.5c + s = 143

    Subtract 1.5c from each side
    4. s = 143 - 1.5c

    Now, take (4) and (2), and plug it into (3)
    12(0.5c) + 5c + 7(143 - 1.5c) = 1030
    6c + 5c + 1001 - 10.5c = 1030

    Combine like terms:
    0.5c + 1001 = 1030

    Use our equation calculator to get c = 58.

    Plug this back into (2)
    a = 0.5(58)
    a = 29

    Now take the a and c values, and plug it into (1)
    29 + 58 + s = 143
    s + 87 = 143

    Using our equation calculator again, we get s = 56.

    To summarize, we have:
    • 29 adults
    • 58 children
    • 56 students
     

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