Which statement is true about a number and its additive inverse?
2 answers:
Answer: Option D
Their sum is always zero
Step-by-step explanation:
Given any number x, the additive inverse of x is -x.
For example, the additive inverse of 3 is - 3, the additive inverse of 2.2 is -2.2.
In this way, note that adding a number with the additive inverse of this number will always result in the number zero.
Therefore, the correct option is option D
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Simplify the right hand side:
Expand the left hand side:
Subtract 2x from both sides:
Divide both sides by 4:
Answer:
0.03125
Step-by-step explanation:
If we have a fair coin the probability of landing a head is 50%.
We can think the question as what is the probability of landing four tails and then a head. That is we needed at least 5 tries to get a head.
Since this events are independent we can write it as