Answer:
Step-by-step explanation:
To solve this problem you must know the formula of subtraction of angles for the function cosx.
The formula is:
We can write 30° as: 45° - 15°
Then:
Using the formula for subtraction of angles we have:
Notice that we have achieved the expression shown in the statement
Finally:
Answer:
1. 1
2. 40
3. 36
Step-by-step explanation:
brainliest?
Solution -
A student who was skeptical about this value decided to conduct a survey by randomly sampling 36 students. On average, the sampled students slept 6.6 hours per night.
The sample mean is the average of the 36 sampled students, which is 6.6 hours. So 6.6 represents the <u><em>sample mean.</em></u>
College newspaper stated that college students get an average of 7 hrs of sleep each night.
The claimed population mean is the stated average from the newspaper article, which is 7 hrs. So 7 represents the <u><em>claimed population mean.</em></u>
6 - 10x = 16
-10x = 10, x = -1
5(-1) = -5
The answer is d
