he;lfvpfk2ewl;9kvebnmhicojbmh3jkiodjhbsws4xAnswer:
Step-by-step explanation:
ewohfgefy80pokjnghjokjhgfdswqwertyuioplkjbv
Answer: Either A or B
Step-by-step explanation:
Both A and B are the same answers, but the main answer should be
c+d=17, 4c+2d =54
C represents the number of cows and D represents the number ducks. The two and fours in front of the variables represents the number of legs the repesctive animal has.
c+d would mean how many animals are in the barn. Feel free to clarify the two same answers
Answer:
B Step 2
Step-by-step explanation:
5(-3) should be -15, not positive 15
Christian is 36 years old.
Answer:
Step-by-step explanation:
a) H0: 
Ha: 
(Two tailed test at 5% significance level)
b) n=30
Mean difference = 
Std error of mean = 
b) Test statistic t = mean diff/std error = -1.552
df = 30-1 =29
p value=0.0657
c) Since p > 0.05 our signi. level, we accept null hypothesis.
There is no significant difference between the means.
d) Using critical value we find that test statistic is > critical value left
So accept H0
