Help please I’m so confused!
2 answers:
Three Ways how to solve- by graphing or using process of elimiation or process of :substitution
Line 1: 3x -y =6
Line 2: 4x +4y = -8
Substitution Method:
y = 3x - 6 (make line 1 equal to x)
then plug it as y into line 2 formula
4x + 4(3x - 6) = -8
Now solve
4x + 12x -24 = -8
16x = 16
x = 1
Elimination Method:
3x -y =6 (multiply the top by 4 to get rid of y )
4x +4y = -8
So, it changes to ...
12x - 4y = 24
4x +4y = -8
then add
16x = 16
x = 1
Graphing:
Plot both equations, then find the point where they intercept and find the x value and that should be your answer
The graph is attached.
x = 1
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Answer:
Step-by-step explanation:
Given that evolution theory hypothesizes that people should spontaneously follow a 24-hour cycle of sleeping and wakingdash–even if they are not exposed to the usual pattern of sunlight.
Sample size n = 8
df = 8- 1=7
Since population std deviation is not known, and sample size is small we can use only t test
(two tailed test at 5% level of significance)
24
28
24
22
25
26
26
25
mean 25
sd 3.142857143
se 1.111167799
Test statistic = Mean diff/se = 1.595
p = 0.1546
since p >0.05, accept null hypothesis.
There is no evidence to prove that the steady cycle is different from 24 hours.