159 children and 351 adults swam at the public pool that day.
Step-by-step explanation:
Total people = 510
Total receipts worth = $1116.00
Cost for one child = $1.50
Cost for one adult = $2.50
Let,
x be the number of children.
y be the number of adults.
According to given statement;
x+y=510 Eqn 1
1.50x+2.50y=1116.00 Eqn 2
Multiplying Eqn 1 by 1.50
[tex]1.50(x+y=510)\\1.50x+1.50y=765\ \ \ Eqn\ 3[/tex]
Subtracting Eqn 3 from Eqn 2;
[tex](1.50x+2.50y)-(1.50x+1.50y)=1116.00-765\\ 1.50x+2.50y-1.50x-1.50y=351\\1.00y=351\\y=351[/tex]
Putting y=351 in Eqn 1
[tex]x+351=510\\x=510-351\\x=159[/tex]
159 children and 351 adults swam at the public pool that day.
Keywords: linear equations, subtraction
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