Answer:
do you have answer options to this.
Answer:
45
Step-by-step explanation:
Triangles equal up to 180 degrees therefore you do the following to solve this equation. So you have 80 and 55. So you add 80 to 55 and you get 135. Now you subtract 180 by 135 and that equals 45. So x=45. I will write it out as well.
55+80=135
180-135=45
x=45
To check.
80+55+45=180
I think the answer is d if it followed the sequence or should be -1 but that’s not an option so my best guess is d hope this helps
use cross products to solve
5* (n-9) = 8*n
distribute
5n-45 = 8n
subtract 5n from both sides
-45 = 3n
divide both sides by 3
-15 = n
