the answer is 12 since the sum of the two angles has to equal 180.
first you do
5x+5+115=180
combine like terms
5x+120=180
subtract 120
5x=60
then divide by 5
x=12
2.2 units
B.
3.9 units
C.
10.8 units
D.
6.1 units
it would be 8 + 16 =8 (1 + 2) because
the GCF is 8 so,
8 (1) + 8 (2)
which would equal to :
8 + 16 = 8 (1 + 2)