PLEASE HELP QUICKLY what's the solution to the equation? Using two of these numbers

-7, -7

-3, -3

0, 0

3, 3

4, 4

7, 7

Two lines that do not intersect are skew. always sometimes or never

How many different three-digit numbers can be formed using the digits 1 comma 2 comma 9 comma 6 comma 4 comma 3 comma and 8 without repetition? for example, 664 is not allowed.

Find the measure of the angle indicated in bold