To determine which of the given pairs \((x, y)\) (where \(x\) is the number of student tickets and \(y\) is the number of adult tickets) is a viable solution for raising a total of $1,575.00, we can use the equation:
\[ 5x + 8y = 1575 \]
Now let's evaluate each of the provided pairs.
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(81, 146.25): \[ 5(81) + 8(146.25) = 405 + 1170 = 1575 \] This works, but \(y\) needs to be a whole number since you can't sell a fraction of a ticket.
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(371, -35): \[ 5(371) + 8(-35) = 1855 - 280 = 1575 \] This works mathematically, but selling a negative number of tickets for adults is not viable.
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(125, 115): \[ 5(125) + 8(115) = 625 + 920 = 1545 \] This does not reach the total goal of 1575.
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(115, 125): \[ 5(115) + 8(125) = 575 + 1000 = 1575 \] This works perfectly.
The only viable solutions that meet the conditions of the problem are:
- \( (115, 125) \)
So the viable solution is (115, 125).