Answer:
the answer is C
Step-by-step explanation:
hope this helps!
Answer:
4x(10)
Step-by-step explanation:
add 3+7=10
4x is multiplying 3+7=10
4x(10)
Answer:
90 arrangements
Step-by-step explanation:
Since there are no repititions of letters, there are unique 10 letters in total.
THe number of arrangements would be 2 permutation 10. We need the formula for permutation. That is:
![nPr=\frac{n!}{(n-r)!}\\](https://tex.z-dn.net/?f=nPr%3D%5Cfrac%7Bn%21%7D%7B%28n-r%29%21%7D%5C%5C)
Now, n = 10 [total] and r is 2, so we have:
![nPr=\frac{n!}{(n-r)!}\\\\_{10}P_{2}=\frac{10!}{(10-2)!}\\=\frac{10!}{8!}\\=\frac{10*9*8!}{8!}\\=10*9\\=90](https://tex.z-dn.net/?f=nPr%3D%5Cfrac%7Bn%21%7D%7B%28n-r%29%21%7D%5C%5C%5C%5C_%7B10%7DP_%7B2%7D%3D%5Cfrac%7B10%21%7D%7B%2810-2%29%21%7D%5C%5C%3D%5Cfrac%7B10%21%7D%7B8%21%7D%5C%5C%3D%5Cfrac%7B10%2A9%2A8%21%7D%7B8%21%7D%5C%5C%3D10%2A9%5C%5C%3D90)
So, there can be 90 arrangements
Hello,
4 is to 78 as x is to 100, we write it as a ratio: