Question 1
There are 5 letters (B, O, K, E, R) and there is a total of 10 letters to make up the word.
There are
![\frac{10!}{(10-6)!6!}](https://tex.z-dn.net/?f=%20%5Cfrac%7B10%21%7D%7B%2810-6%29%216%21%7D%20)
ways of arranging the letters, which equal to 210 ways
Question 2
There are seven swimmers in total.
There are
![\frac{7!}{(7-1)!1!}](https://tex.z-dn.net/?f=%20%5Cfrac%7B7%21%7D%7B%287-1%29%211%21%7D%20)
ways of choosing the first winner, which is 7 ways
There are
![\frac{6!}{(6-1)!1!}](https://tex.z-dn.net/?f=%20%5Cfrac%7B6%21%7D%7B%286-1%29%211%21%7D%20)
ways of choosing the second winner, which is 6 ways
There are
![\frac{5!}{(5-1)!1!}](https://tex.z-dn.net/?f=%20%5Cfrac%7B5%21%7D%7B%285-1%29%211%21%7D%20)
ways of choosing the third winner, which is 5 ways
There are 7×6×5=210 ways of choosing first, second, and third winner
Question 3
The probability of eating an orange and a red candy is
![\frac{15}{31}](https://tex.z-dn.net/?f=%20%5Cfrac%7B15%7D%7B31%7D%20)
×
![\frac{9}{30}](https://tex.z-dn.net/?f=%20%5Cfrac%7B9%7D%7B30%7D%20)
, which equals to
![\frac{9}{62}](https://tex.z-dn.net/?f=%20%5Cfrac%7B9%7D%7B62%7D%20)
The probability of eating two green candies is
![\frac{7}{31}](https://tex.z-dn.net/?f=%20%5Cfrac%7B7%7D%7B31%7D%20)
×
![\frac{6}{30}](https://tex.z-dn.net/?f=%20%5Cfrac%7B6%7D%7B30%7D%20)
which equals to
Any number that makes an equation true is a "solution of an equation" it id a solution....(i hope this helps) *smiles*
Answer:
31, 32, 33
Step-by-step explanation:
x + x + 1 +x + 2 = 96
3x + 3 = 96
-3 -3
3x = 93
/3 /3
x = 31
31 is the first number, so since they’re consecutive, the second two numbers are 32 and 33.
<em>Note: Your question seems a little bit ambiguous. So, I am assuming the given function f(x)=9x+7.</em>
<em>Thus, I am solving based on it. It would still clear your concept. </em>
Answer:
The inverse of f(x)=9x+7
Step-by-step explanation:
Given the function
![f(x)=9 x + 7](https://tex.z-dn.net/?f=f%28x%29%3D9%20x%20%2B%207)
A function g is the inverse of function f if for y=f(x), x=g(y)
Replace x with y
![x=9y+7](https://tex.z-dn.net/?f=x%3D9y%2B7)
solve for y
![9y=x-7](https://tex.z-dn.net/?f=9y%3Dx-7)
![y=\:\frac{x-7}{9}](https://tex.z-dn.net/?f=y%3D%5C%3A%5Cfrac%7Bx-7%7D%7B9%7D)
Therefore,
The inverse of f(x)=9x+7 is:
i.e.
![\mathrm{Inverse\:of}\:9x+7:\quad \frac{x-7}{9}](https://tex.z-dn.net/?f=%5Cmathrm%7BInverse%5C%3Aof%7D%5C%3A9x%2B7%3A%5Cquad%20%5Cfrac%7Bx-7%7D%7B9%7D)
f(x) = 5x²
f(10) = 5(10)² = 5(100) = 500
f'(x) = 10x
f'(10) = 10(10) = 100
Now, find the line that passes through (10, 500) and has a slope of 100
y - y₁ = m(x - x₁)
y - 500 = 100(x - 10)
y - 500 = 100x - 1000
y = 100x - 500