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22 December, 09:28

The Jurassic Zoo charges $8 for each adult

admission and $5 for each child. The total bill

for the 160 people from a school trip was

$863. How many adults and how many

children went to the zoo?

+5
Answers (1)
  1. 22 December, 09:44
    0
    21 adults and 139 children

    Step-by-step explanation:

    x=adult (8$)

    y=child (5$)

    8x + 5y = 863

    x+y=160

    -x - x (subtract x on both sides)

    y = - x + 160

    plug that in for y on the other equation

    8x + 5 (-x + 160) = 863

    distribute 5 to both

    8x + - 5x + 800 = 863

    combine both x values

    3x + 800 = 863

    -800 - 800 (subtract on both sides)

    3x = 63

    divide by 3 on both sides

    x = 21 adults

    now plug x in one of the equations

    21 + y = 160

    -21 - 21

    y=139 children
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