Answer:
Step-by-step explanation:
the first one
Answer:
there are 15 birds all together and 5 black birds on the tree.
Step-by-step explanation:
Answer:
x = 16
Step-by-step explanation:
6x + 4 and 5x are adjacent angles on a straight line and sum to 180° , that is
6x + 4 + 5x = 180
11x + 4 = 180 ( subtract 4 from both sides )
11x = 176 ( divide both sides by 11 )
x = 16