Am i correct? will give brainliest!

-9 + (4)(2)
-9 + 8
= -1

-1 is your answer! Hope I helped! Please give me brainliest because I explained how I got the -)

Cbecause they are equal so that means it is the same on both sides? ! hope this

Okay so for every triangle has three angles that always add up to 180 degrees. and to tell the difference between whether they are secure, right or obtuse is that acute: has one angle that is less than 90 degrees. right triangle means there is at least one angle that is exactly 90 degrees. and an obtuse angle has an angle that is bigger than 180 degrees. i’ll do #13 as an example: 13. 40 and 50 so if every triangle has 180 degrees 40+50= 90 degrees then180-90= 90 degrees so the third angle is 90 degrees and because this triangle has a 90 degree angle it means it is a right triangle