<span>Sqrt x+71 = x
x= 1+ sqrt 285
----------------
2
x= 8.94097150
hope it helps </span>
Answer:
38.5
Step-by-step explanation:
Lets say, first number = x
Second number = 3x+7
Total = 49
(x)+(3x+7)= 49
4x+7 = 49
4x = 42
x = 42/4
x= 10.5
x= 10.5
3x+7 = 3(10.5)+7 = 38.5
Hope this helps!!
Answer:
Nearly 50 times
Step-by-step explanation:
Chen's Jumble has 4 classical songs, 3 rock songs, and 22 rap songs on it, 4 + 3 + 22 = 29 songs in total.
The probability to listen the classic song is
![\dfrac{\text{Number of classic songs}}{\text{Total number of songs}}=\dfrac{4}{29}](https://tex.z-dn.net/?f=%5Cdfrac%7B%5Ctext%7BNumber%20of%20classic%20songs%7D%7D%7B%5Ctext%7BTotal%20number%20of%20songs%7D%7D%3D%5Cdfrac%7B4%7D%7B29%7D)
Chen is going to listen to 360 songs. Then the predicted number of times Chen will listen classic songs is
Answer:
As sample sizes increase, the sampling distributions approach a normal distribution. With "infinite" numbers of successive random samples, the mean of the sampling distribution is equal to the population mean (µ).
Step-by-step explanation:
population variance =σ
sample variance=
}[/tex]
where n is sample size
so as n increases ,
}[/tex] decreases, so sample variance decreases
Answer: B(4,-4)
Step-by-step explanation:
M(3,0) A(2,4) B(x,y)=?
![\displaystyle\\x_M=\frac{x_A+x_B}{2} \\\\Multiply\ both\ parts\ of\ the\ equation\ by \ 2:\\2x_M=x_A+x_B\\2x_M-x_A=x_A+x_B-x_A\\2x_M-x_A=x_B\\x_M=3\ \ \ \ \ x_A=2\\Hence,\\2*3-2=x_B\\6-2=x_B\\4=x_B\\Similarly:\\2y_M-y_A=y_B\\y_m=0\ \ \ \ \ y_A=4\\Hence,\\2*0-4=y_B\\0-4=y_B\\-4=y_B\\Thus,\ B(4,-4)](https://tex.z-dn.net/?f=%5Cdisplaystyle%5C%5Cx_M%3D%5Cfrac%7Bx_A%2Bx_B%7D%7B2%7D%20%5C%5C%5C%5CMultiply%5C%20%20both%5C%20%20parts%5C%20%20of%5C%20%20the%5C%20%20equation%5C%20by%20%5C%202%3A%5C%5C2x_M%3Dx_A%2Bx_B%5C%5C2x_M-x_A%3Dx_A%2Bx_B-x_A%5C%5C2x_M-x_A%3Dx_B%5C%5Cx_M%3D3%5C%20%5C%20%5C%20%5C%20%5C%20x_A%3D2%5C%5CHence%2C%5C%5C2%2A3-2%3Dx_B%5C%5C6-2%3Dx_B%5C%5C4%3Dx_B%5C%5CSimilarly%3A%5C%5C2y_M-y_A%3Dy_B%5C%5Cy_m%3D0%5C%20%5C%20%5C%20%5C%20%5C%20y_A%3D4%5C%5CHence%2C%5C%5C2%2A0-4%3Dy_B%5C%5C0-4%3Dy_B%5C%5C-4%3Dy_B%5C%5CThus%2C%5C%20B%284%2C-4%29)