Answer:
∠ BAC = 80°
Step-by-step explanation:
The sum of the interior angles of quadrilateral ACDB = 360°
DB and DC are tangents to the circle, thus
∠ DBA = ∠ ACD = 90° ( angle between tangent/ circle at point of contact )
Thus
∠ BAC + 90° + 90° + 100° = 360°
∠ BAC + 280° = 360° ( subtract 280° from both sides )
∠ BAC = 80°
Answer:
You can proceed as follows:
Step-by-step explanation:
First solve the quadratic inequality . To do that, factorize, then we have that . This implies that
or
In the first case the solution is the empty set . In the second case the solution is the interval . Now we have that
.
To show that consider . Then , this implies that , then . Now, to show that consider , then , then , then , this implies that .
Observe the image below.
Answer:
-2n^2 - 12n, that's how I understand
Answer:
Step-by-step explanation:
i AM PRETTY SURE ITS D