Simplify the expression: 2/3 divided by - {1/6 - 8/6}
1 answer:
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Answer:
one solution: (-1,1)
Step-by-step explanation:
we have
----> equation A
----> equation B
Solve the system by substitution
Substitute equation A in equation B
solve for x
<em>Find the value of y</em>
---->
The solution is the point (-1,1)
therefore
one solution: (-1,1)
Since there are no restrictions on the three-digit numbers (for example no repetitions), we actually don't care about the values of the digits. All we need to know is that there are
possible digits, and that we have to extract a triplet from here.
For problems like this we have the binomial coefficient, defined as
This number tells you how many subsets of k elements you can extract from a set of n elements. So, in your case, you want to compute