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Nookie1986 [14]
3 years ago
13

The zurassic zoo charges $11 each for adult admissions and $4 each for each child. The total bill for the 138 people from a scho

ol trip was $839. How many adults and how many children went to the zoo?
Mathematics
1 answer:
LenaWriter [7]3 years ago
4 0

The number of adults = 41

The number of children = 97

Step-by-step explanation:

Let x be the number of adults and

y be the number of children

then according to the given conditions

x+y = 138\ \ \ Eqn\ 1\\11x+4y = 839\ \ \ Eqn\ 2

From equation 1:

x = 138-y

Putting in equation 2

11(138-y)+4y = 839\\1518-11y+4y = 839\\1518 -7y = 839\\-7y = 839-1518\\-7y = -679\\

Dividing both sides by -7

\frac{-7y}{-7} = \frac{-679}{-7}\\y = 97

Putting y = 97 in equation 1

x+ 97 = 138\\x = 138-97\\x = 41

Hence,

The number of adults = 41

The number of children = 97

Keywords: Linear equations variables

Learn more about linear equations at:

  • brainly.com/question/8955867
  • brainly.com/question/9045597

#LearnwithBrainly

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