When x=9 the expression is undefined.
That is because any number over 0 is undefined, including 0/0.
Answer: s = -3.3
<u>Step-by-step explanation:</u>

-3.3 = s
I don’t know exactly but I tried the math and it’s either 4 or 5%
Answer:
63 degrees
Step-by-step explanation:
Since this is an isosceles triangle, the two bottom angles must be equal, while the top angle (in the way this specific triangle is oriented) must be different. Therefore, angle CDB is 63 degrees.