3 years ago

Solving systems of three equations w/ elimination

Mathematics

1 answer:

Feliz [49]3 years ago

8 0

I solved with addition elimination, and matrices elimination and received the same answer. (0,0,-3) I hope that helps.

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Answer:

Total tickets = 70

Total cost = $550

Adult's ticket = $9

Child's ticket = $5

Difference = 9 - 5 = $4

Assume all 70 are child's tickets

5 x 70 = 350

But the total cost was 550

550 - 350 = $200

The $200 must have come from Adult's tickets, which has a difference of $4.

200 ÷ 4 = 50

So there are 50 adult's tickets.

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