WILL GIVE BRAINLIEST What did they do incorrectly
40 + 70 + ? = 360
110 + ? = 360
-110 -110
? = 250

In the equation 40+70+?=360, they are trying to find the last angle.

First they would add 40 and 70, which is 110.

So 110+?=360

360-110=?

360-110=250

Well this is wrong, because every angle in a triangle adds up to 180 degrees.

If you are adding up the angles in a quadrilateral, only then it adds up to 360 degrees.

So they did everything right, but they didn't use the right "total degrees"

This is what it was supposed to look like.

40+70+?=180

110+?=180

180-110=?

180-110=70

?=70

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❀ 0ranges ❀

the answer is y = 11.54

hope this : )

won't that be plagrisim thought?

step-by-step explanation: