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irinina [24]
3 years ago
15

Solve the system by the substitution method. 7x + y = -6 7x - 3y = 18

Mathematics
2 answers:
Elodia [21]3 years ago
7 0

Answer:

Stdivise 7 aep-by-step explanation:

Yuri [45]3 years ago
3 0

Answer:

Step-by-step explanation:

7x + y = -6

y = -7x - 6

7x - 3y = 18

7x - 3(-7x - 6) = 18

7x + 21x + 18 = 18

7x + 21x = 18 - 18

28x = 0

x = 0/28

x = 0 <=========

7x + y = -6

7(0) + y = -6

0 + y = -6

y = -6 <==========

solution is : (0,-6)

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Area around
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7 0
3 years ago
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MatroZZZ [7]

The number of days when the season pass would be less expensive than the daily pass is 5 days.

<h3>How many days would the season pass be less expensive?</h3>

The equation that represents the total cost of skiing with the daily pass : (daily pass x number of days) + (cost of renting skis x number of days)

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The equation that represents the total cost of skiing with the seasonal pass : cost of season pass + (cost of renting skis x number of days)

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When the season pass becomes less expensive, the inequality equation is:

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$90d > $300 + $20d

In order to determine the value of d, take the following steps:

Combine and add similar terms: $90d - $20d > $300

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Divide both sides by 70 d > $300 / 70

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Answer:

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