Answer:
<h2><em><u>
not sure about answers</u></em></h2>
Question 1 : A or B or C don't know
Question 2: A = that is what the question is answering
Question 3: B = that is what the question is answering
Question 4: B = that is what the question is answering
Step-by-step explanation:
Answer:
(D) 120 degrees
Step-by-step explanation:
From the figure drawn, we have
∠ABC=60°
And ∠OAB=∠OCB=90° (angles made by tangent on the circle is 90°)
Thus, ∠AOC+∠OCB∠CBA+∠OAB=360° (Angles sum property of quadrilateral)



Therefore, the value of x is 
Hence, option D is correct.
Answer:
the answer is c.(3,-3)
:)
Step-by-step explanation:
Solve for the first variable in one of the equations, then substitute the result into the other equation.
8 + 2(10 - r) = 8 + 20 - 2r = 28 - 2r