<span>-3x+7=6x-2
-3x+(-6x)=-7+(-2)
-9x=-9
x=1</span>
Answer:
Step-by-step explanation:
When dividing fractions, the formula is simple: Keep Flip Change (KFC)
So keep 
change your division sign to a multiplication sign, and flip 
so it becomes 
.
·=
Then you need to reduce your fraction to simplest form.
If you have two sides, you only need two. Otherwise it’s 3 parts
Answer:
(1238.845 ;1285.376)
Step-by-step explanation:
Conditions for constructing a confidence interval :
Data must be random
Distribution should be normal and independent ;
Based on the conditions above ; data meets initial conditions ;
C. I = sample mean ± margin of error
Given the data :
1241 1210 1267 1314 1211 1299 1246 1280 1291
Mean, xbar = Σx / n = 11359 / 9 = 1262.11
The standard deviation, s = [√Σ(x - xbar)²/n - 1]
Using a calculator ; s = 37.525
The confidence interval :
C.I = xbar ± [Tcritical * s/√n]
Tcritical(0.10 ; df = n - 1 = 9 - 1 = 8)
Tcritical at 90% = 1.860
C. I = 1262.11 ± [1.860 * 37.525/√9]
C.I = 1262.11 ± 23.266
(1238.845 ;1285.376)
± 23.266
The margin of error :
[Tcritical * s/√n]
[1.860 * 37.525/√9]
C.I = ± 23.266
The log of this is 15 because I multiplied 5•3 that gave me 15 so the answer to this problem is 15
