I need help with 7th grade math please 30 points need help ASAP + brainleist
2 answers:
You might be interested in
If you look up "angles of 7 sided polygon" it would give a result of how many degrees polygons with 7 sides such as this one above would equal to. It's important to know that when finding x angles within.
7-sided polygons = 900 degrees in total
Since all the other angles except x are given, we can add all those up and set it equal to 900. So it would look like this:
Simply solve for x now.
So x = 111 degrees.
Hope this helps!
Answer:
a) 0.1984
b) No. Is not too small to support the conjecture with confidence
Step-by-step explanation:
1) Previous concepts and data given
The sample sizes are
We can find the distribution for , and since is a sampling distribution and
and
follows normal distributions then
follows a normal distribution too.
The mean and the deviation for is given by:
and since
then
Since both A and B have the same deviation and variance then:
2) Part a
We want to find:
The random variable
follows a normal distribution with mean 0 and deviation 1 we can use this:
3) Part b
From part a we found that we have a change of 19.84% that the experiment would give a difference between the sample means which is greater or equal than 0.2
Analyzing the probability obtained we can say that is not too small to support the conjecture with confidence that the population means for the two machines are different
Answer:
Step-by-step explanation:
This is one of the easier things to do so definitely learn how to do it.
You just start by taking the first number in each parenthesis (F) and then multiply. 2x by x is 3x^2
Then take the outer (O) number from both problems, so the leftmost and rightmost number. 2x times -1 is -2x
Then take the two inner (I) numbers, 3 and x. Multiply and get 3x
Then take the last number in each parentheses (L) which is 3 and -1, get -3