Answer:

Step-by-step explanation:
Lines form 180 degrees on either side. The negative sign simply implies direction (clockwise instead of counter-clockwise), which is negligible as 180 is exactly half of 360 so you'd form the same line.
Simple....
8*3=24
8+3=11
Thus, your answer.
50/50 chance of getting a yellow marble.
Explanation:
There are 10 yellow marbles in the bag, and the other half are other colors. This would create a 50/50 ratio.
I am honestly super rusty with probability but oh well...
Answer:
6x
Step-by-step explanation:
Combining like terms is simply representing them as a single term. With algebra, you can perform arithmetic on the coefficient (the 10 and the 4) to simplify the expression, giving you 6x.