![a_1=153\\a_2=139\\a_3=125\\\vdots\\\\d=a_2-a_1\to d=139-153=-14](https://tex.z-dn.net/?f=%20a_1%3D153%5C%5Ca_2%3D139%5C%5Ca_3%3D125%5C%5C%5Cvdots%5C%5C%5C%5Cd%3Da_2-a_1%5Cto%20d%3D139-153%3D-14%20)
The formula of the sum of the arithmetic sequence:
![S_n=\dfrac{2a_1+(n-1)d}{2}\cdot n](https://tex.z-dn.net/?f=S_n%3D%5Cdfrac%7B2a_1%2B%28n-1%29d%7D%7B2%7D%5Ccdot%20n)
We have:
![a_1=153\\d=-14\\n=22](https://tex.z-dn.net/?f=a_1%3D153%5C%5Cd%3D-14%5C%5Cn%3D22)
substitute
![S_{22}=\dfrac{2\cdot153+(22-1)\cdot(-14)}{2}\cdot22=(306+21\cdot(-14))\cdot11=132](https://tex.z-dn.net/?f=%20S_%7B22%7D%3D%5Cdfrac%7B2%5Ccdot153%2B%2822-1%29%5Ccdot%28-14%29%7D%7B2%7D%5Ccdot22%3D%28306%2B21%5Ccdot%28-14%29%29%5Ccdot11%3D132%20)
Answer:
w = 8
Step-by-step explanation:
8w = 64, divide 64 by 8, you get
w = 8
Answer:
3x • (x - 4) • (x - 1)2
Step-by-step explanation:
P(x) = C(5,X) *0.3^x *(1-0.3)^5-x
x = 0
P(0) = C(5,0) *0.3^0*0.7^5
= 5 *1 *0.16807
= 0.84035 = 84.0%