Answer:
supplementary angles add up to 180°
given y=65° thus...
x+y=180°
x + 65°=180°
x=180°- 65°
x=115°
Answer:
8
Step-by-step explanation:
6.4n-10=4.4n+6
6.4n-4.4n=6+10
2n=16
n=8
9m+5=-13
9m=-18
m=-18/9
m=-2
first off, bear in mind that the terms are usually separated by a + or a - sign.
secondly, the degree of a term of a polynomial comes from the sum of its variables' exponents.
a)

b)

The internal angles in a triangle add up to 180
I think the question should say
'2 angles in a triangle add up to 115 degrees'
so therefor
x+y+z=180
2 angles are x+y
115+z=180
z=3rd angle
solve
115+z=180
subtract 115 from boths ides
z=65
answer is third angle=65 degrees