Answer:
16
Step-by-step explanation:
4+4=8
8+8=16
Answer:
(507.05, 592.95)
Step-by-step explanation:
Given data:
sample mean = $550, sample standard deviation S = $60.05
95% confidence interval , n = 10
For 95% confidence interval for the mean
mean ± M.E.
where M.E. is margin of error = ![t_{n-1}, \alpha/2\times\frac{S}{\sqrt{n} }](https://tex.z-dn.net/?f=t_%7Bn-1%7D%2C%20%5Calpha%2F2%5Ctimes%5Cfrac%7BS%7D%7B%5Csqrt%7Bn%7D%20%7D)
Substituting the values in above equation
![=t_{10-1}, 0.05/2\times\frac{60.05}{\sqrt{10} }](https://tex.z-dn.net/?f=%3Dt_%7B10-1%7D%2C%200.05%2F2%5Ctimes%5Cfrac%7B60.05%7D%7B%5Csqrt%7B10%7D%20%7D)
= 2.62×18.99
=42.955
= 550±42.95
=(507.05, 592.95)
Answer:
x = 3.8
Step-by-step explanation:
The equation is (5 - x) / 2 = 2x - 7
Multiply both sides by 2:
5 - x = 4x - 14
Add 14 to both sides:
19 - x = 4x
Add x to both sides:
19 = 5x
Divide both sides by 5 to isolate x:
3.8 = x
Therefore, x = 3.8.
We can solve this by distributing
![4(8x+5)](https://tex.z-dn.net/?f=4%288x%2B5%29)
Now, distribute the 4 to both 8x and 5.
![32x+20](https://tex.z-dn.net/?f=32x%2B20)
That's your answer!
Mason had his payday yesterday. He billed $2445 into his bank account which already had $5078. The next day, he went to the supermarket and bought a $1934 TV with his credit card. That was also billed out from his bank account. You solve it by doing 2445+5078. Then with that answer, -1934 from it.