Your answer would be B, X+2 Y-1
Answer:
20ft
Step-by-step explanation:
Height from the ground=16ft
distance from wall= 12ft
length of the stick=?
<em>According to the Pythagoras theorem the square of the hypotenuse is equal to the sum of the squares of the opposite sides.</em>
Here the stick is the hypotenuse.

144+ 256= 
= 400

Hence the length of the stick is 20ft.
Hope this helps.
Answer:
<h2>Complementary angles.</h2>
Step-by-step explanation:
The graph is attached.
Notice that
,
and
, by given.
, by sum of angles.
, by supplementary angles definition.

Which means,

Therefore,
, in other words, angles a and b are complementary by defintion.
So, the right answer is the second choice.