The jurassic zoo charges $5 for each adult and $3 for each child the total bill for the people from school trip was $420 how many adults and how many child went to the zoo

The number of adults who went to the zoo was 21 and the number of children was 105.

Step-by-step explanation:

The complete question is

The Jurassic Zoo charges $5 for each adult admission and $3 for each child. The total bill for the 126 people from a school trip was $420. How many adults and how many children went to the zoo?

Let

x -----> number of adults

y ----> number of children

we know that

------> equation A

----> equation B

Solve the system by graphing

The solution is the intersection point both graphs

The solution is the point (21,105)

see the attached figure

therefore

The number of adults who went to the zoo was 21 and the number of children was 105.

just take the area of the square and then the area of the circle then subtract the circle area from the squares area

step-by-step explanation: