Answer:
y³ - 3y² + 1/y+3
Step-by-step explanation:
y² - 9 = (y - 3) ( y + 3)
y-3/(y-3)(y+3) = 1/y+3
Answer:
7d-5
Step-by-step explanation:
A regular pentagon has 5 sides of equal length.
The perimeter of a regular pentagon is given by
P = 5s where s is the side length
35d -25 = 5s
Divide each side by 5
(35d-25)/5 = 5s/5
7d-5 =s
Each one of the sides is equal to 7d-5
Answer:
1/36
Step-by-step explanation:
When you roll it the first time, the chances to get a 1 is 1/6.
when you roll it the second time, the chance is still 1/6, but the chance of rolling one twice in a row, is the product of the probabilities:
1/6 * 1/6 = 1/36
Answer:
6
Step-by-step explanation:
12÷2=6
Hope this helps! :)
For a known standard deviation a confidence level of 99% we may consider Z=<span>2.576.
So, the confidence interval would be calculated by:
</span>
,
⇔
⇔
,
⇔
⇔
,
⇔
⇔
,
Considering the given data, with a 99% cofidence, it can be said that the true mean of hours of study in a typical week for first-year college students is between 14.282 and 16.318.