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Murljashka [212]
2 years ago
6

Can someone please explain to me how to solve #7?

Mathematics
1 answer:
aivan3 [116]2 years ago
3 0
Sum of all angles inside of a triangle equal 180 degree

The sum of obtuse angles (the one inside of the triangle, bottom right and the one next to is ) must total 180 degrees

so first I would do the obtuse ones

180 = x +15x-4
180 = 16x - 4
184 = 16x
x = 11.5 degrees

so now I would do the inside triangle angles...tell me what you got


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oksian1 [2.3K]
<h3>Answer: (-infinity, 7]</h3>

=====================================

Explanation:

The first interval (-infinity, 3) describes any number less than 3, so we can write x < 3 in short hand (where x is the unknown number).

The second interval (-1, 7] means we start at -1 and stop at 7. We do not include -1 but include 7. So we say that -1 < x \le 7 (ie x is between -1 and 7; exclude -1, include 7)

If you were to graph each ona number line, you would see that the too intervals have overlapping parts. The right most edge extends out as far as x = 7. There is no left most edge as it goes onforever that direction.

Therefore, the to intervals combine to get x \le 7 which turns into the interval notation answer of (-infinity, 7]

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It might help to think of it like this: x < 3 and -1 < x \le 7 say "x is some number that is less than 3, or it is between -1 and 7". So x could be anything less than 7, including 7 itself.

4 0
3 years ago
Can anyone help with this question?.. thanks in advance!!
agasfer [191]
Hell naw, nobody is about to do that for you
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4(w + 5) =——w+——<br><br> PLEASE HELP I WILL MARK AS BRAINLIEST IF CORRECT
Rudiy27

Answer:

4(w+5) = 4w+20

Step-by-step explanation:

use distributive property and you get your answer :)

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