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Keith_Richards [23]
3 years ago
5

There are 3 seats in each row in a school auditorium. There are 15 rows in the auditorium. Each new seat costs $74. What is the

cost for the new seats? Explain how you found your answer.
Mathematics
1 answer:
Akimi4 [234]3 years ago
6 0

3 seats x 15 rows = 45 total seats

45 seats x $74 = $3,330.00 total cost
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Let s and g represents the numbers of suits and gowns produced.

The number of zippers used is 2s+g.

The number of buttons used is 5s+8g.

In order to use all of the available zippers and buttons, we must have ...

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  • 5s + 8g = 576

Cramer's rule tells you the solution to the system

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  • dx +ey = f

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Using this rule on the equations for zippers and buttons, we have

... s = (1·576 -8·171)/(1·5 -8·2) = -792/-11 = 72

... g = (171·5 -2·576)/-11 = -297/-11 = 27

72 suits and 27 gowns can be made from available zippers and buttons.

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plz mark my answer as brainlist plzzzz vote me also.

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