Answer:
The number to be added is 6.89
Step-by-step explanation:
Here, we want to know what number must be added to the expression to make it equal to zero.
Let the number be x
Thus;
-6.89 + 14.52 -14.52 + x = 0
-6.89 + x = 0
x = 6.89
Answer:
No, it is not a function.
Step-by-step explanation:
A function graph are graphs where the lines do not connect. Since the shape is a circle, many lines in the graph are connecting.
No, this is not valid. In the picture below,

is a vertical angle with

. But

is not