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Savatey [412]
3 years ago
15

Help me find y........​

Mathematics
1 answer:
Elodia [21]3 years ago
4 0

Answer:

Step-by-step explanation:

a)

the sum of all angles in a quadrilateral must be 360º

y+88+25+35 = 360

y = 360=88-25-35

y = 212º

b)

the sum of all angles in an octagon must be 1080º

45+45+140+140+6y = 1080

6y = 1080-90-280

6y = 710

y = 710/6

y=~ 118,3º

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Answer:

Step-by-step explanation:

To use substitution in this problem, you find the Y which ='s -3. That we have clear. Now, the second equation becomes x - 5(-3) =7. A negative times a negative is a positive, so 15. Now, we have x + 15 = 7. Subtract 15 from 7 to get x = -8. Your coordinates, or your answer, will be (-8, -3)

8 0
2 years ago
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Answer:

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Step-by-step explanation:

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3 years ago
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Step-by-step explanation:

Please see the step-by-step solution in the picture attached below.

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