Answer:Yes
Step-by-step explanation:
The value of n which makes the expression true is - 9
Given the expression : 4(0.5n-3)=n-0.25(12-8n)
The value of n which makes the expression true can be obtained by solving for n ;
4(0.5n-3)=n-0.25(12-8n)
Open the bracket :
2n - 12 = n - 3 + 2n
Collect like terms :
2n - 2n - n = - 3 + 12
-n = 9
Divide both sides by - 1 to isolate n
Hence ;
n = - 9
The value of n which makes the expression true is - 9
Equating "equal" as symmetrical:
Two windows of the same size and placed in the same position is considered symmetrical. In an example where one window is placed at a certain distance from a wall and a certain distance from the floor, another window of the same size is also placed in the opposite side of the first window (based on a constant center) with the same distance from the floor and wall. The two windows can be considered equal.
Answer:
Yes, we can conclude that the population standard deviation of TV watching times for teenagers is less than 2.66
Step-by-step explanation:
H0 : σ² = 2.66²
H1 : σ² < 2.66²
X²c = (n - 1)*s² ÷ σ²
sample size, n = 40
Sample standard deviation, s = 1.9
X²c = ((40 - 1) * 1.9²) ÷ 2.66²
X²c = 140.79 ÷ 7.0756
X²c = 19.897
Using a confidence level of 95%
Degree of freedom, df = n - 1 ; df = 40 - 1 = 39
The critical value using the chi distribution table is 25.6954
Comparing the test statistic with the critical value :
19.897 < 25.6954
Test statistic < Critical value ; Reject the Null
Hence, we can conclude that the population standard deviation of TV watching times for teenagers is less than 2.66
The answer is D= 77, 77-37=40
Answer:
5x+8
Step-by-step explanation:
In the picture.
I hope that it's a clear solution.
