Answer:
x+5=5
Step-by-step explanation:
This is an equation where you are actually solving it. The others are expressions.
(x,y,z)=(-4,-2,-5)
I added some images for explanation
Answer:
Don't spin the barrel.
Step-by-step explanation:
Each time you spin the barrel, the probability A of finding a bullet, having two bullets in six chambers is:

For you to get shot in the second try but not the first, the barrel spin would have to stop precisely at one specific chamber: the one right before the bullets, so that probability would be:

which means that this event is half as likely as finding a bullet every time the barrel is spun. Your chances are better if you pull the trigger for the second time without spinning the barrel.
<ACB = 1/2(100 - 42)
<ACB = 1/2(58)
<ACB = 29
answer is A. 29