Answer:
Assuming that
is a diameter.
Given that 
And that point O is the center of the circle

Explanation:
Because angle AOB is subtended by arc AB from point O.
Arc AB is equal to the measure of that angle.
Since arc ABC is subtended by the diameter, the arc is 180°.
Answer:
Option B
Step-by-step explanation:
Step-by-step explanation:
We have the function
then, by definition:
If
then the graph is compressed vertically by a factor a.
If
then the graph is stretched vertically by a factor a
If
then the graph is reflected on the x axis.
If
the graph moves vertically upwards d units.
If
the graph moves vertically down d units.
We know that:
then the graph is stretched vertically by a factor a
and
the graph moves vertically down d units
The searched graph is stretched vertically and its vertex is displaced downwards
The answer is option B
For example smallest x which makes inequelity is x =14
because 14 + 7 = 21 > 20
you can take any number >= 14