8x-77 would be the answer to this
3/8+2/8+1/8= 6/8 or 3/4 of the DVDs aren't travel
This leaves the remaining 1/4 of the DVDs as travel
Answer:
56 students are in band
Step-by-step explanation:
Since 75% is basically 3/4, you should find first how much people are in 1/4 or 25%.
You can do this by dividing 42 and 3
42 divided by 3 = 14
You can check your answer because there are 42 students who play wind instruments and 14 + 14 + 14 = 42
Then you add another 14 to 42 since the students who play wind instruments are only 75%
42 + 14 = 56
56 students are in band
X=5 because this same question was in my test and I got it right
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.