Perimeter is 54 cm. length is 15 cm so 2 x 15 =30 . so we are left with 54-30 =24 cm.so 2 x width =24 cm . so the width is 12 cm
Answer:
The perimeter is 38 but it gets rounded to 40
Step-by-step explanation:
Answer:
- 6x +8 is standard form
Step-by-step explanation:
terms with highest exponents come first, then descend in order
Answer:
![\frac{n!}{r!(n-r)!}](https://tex.z-dn.net/?f=%5Cfrac%7Bn%21%7D%7Br%21%28n-r%29%21%7D)
Step-by-step explanation:
Combinatorial explanation:
The n balls have to be arranged in n positions and the only distinction is where are the black and where white balls are.
We can choose the position of black balls in
ways, therefore, white ones are on the remaining positions.
Using binomial we can have explanation written below:
The balls can be arranged in n! possible permutations.
To be precise one particular arrangement includes
permutations. Since r black balls can be permuted in r! ways and white balls in (n-r)! different orders.
So basically it yields,
permutations.
So the actual amount is,
![\frac{r!}{(n-r)!}= \binom{n}{r}=\binom{n}{n-r}](https://tex.z-dn.net/?f=%5Cfrac%7Br%21%7D%7B%28n-r%29%21%7D%3D%20%5Cbinom%7Bn%7D%7Br%7D%3D%5Cbinom%7Bn%7D%7Bn-r%7D)