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EastWind [94]
2 years ago
7

For brainily please help

Mathematics
1 answer:
steposvetlana [31]2 years ago
6 0
Answer: b = 69

The slashes mean the opposite angles are the same. This is and isosceles triangle, which mean two sides are the same and one is not.

A triangle = 180

We know one angle is 42 and the other two angles are the same.

Subtract 42 from 180

180 - 42 = 138

Now the 138 is going to two sides but we know they are equal so we can divide 138 by 2

138 divided by 2 = 69

So b = 69

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Answer:

(2, 13)

Step-by-step explanation:

Since they both equal y, you can equal them to each other.

8x - 3 = 2x + 9

Subtract 2x from both sides.

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Add 3 to both sides.

6x = 12

Now divide 6 on both sides.

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Now that we have found x, we need to find y. Just plug in x to the equations.

y = 2(2) + 9

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8(2) -3 = y

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13 = y

So therefor, both x and y are true.

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Answer:

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