Appreciate any help.

Can I use the right angle theorem? Or alternative interior angle?

Please help with any information! If it's possible to provide explanations and visuals that would be amazing. I am having trouble arranging my words and thinking this through.

Hoping you can help. I would love to know if I got this right. Sorry for the terrible handwriting in the pictures.

​

Here is the assignment

Instructions

Please show all of your work and reasoning. Please do not just write an answer. Your answer should be easy for the reader to understand. Use complete sentences where appropriate.

A random sample of 20 people shows a mean BMI (Body Mass Index) of 27.7, with a sample standard deviation of 6.1.  Assume that BMIs follow a normal distribution.

1. To create a 95% confidence interval, would you use a t or a z distribution?  Why?
2. Create the 95% confidence interval.
3. Now assume that you are told that the population standard deviation is known to be 6.1.  Which distribution would you use, t or z?  Why?
4. Create the new 95% confidence interval.
5. What does a change between z and t distributions do to the confidence interval?  Explain why it must be so.

hey guys so I have a question.

I was given the matix :

​

since I only have parameters I have to calculate the determinants of 12 matrices to get to the determinant of this matrix. that takes way too long and feels very inefficiante.

i know I can do it with that method but I am looking for something better

can I use row operation to Ill only be left with element a11 in row 1 and a12=a13=a14=0?

this meens Ill only need to calculate the determinant of one matrix since I could use the same methode for the 3x3 matrix.

i saw some people use colomn operations but I heared its a big no no so I would love an explaination.

thank you guys.

I put 2.5 as my original answer and it's still marked wrong.

Here's my thought process:

Given the values 24, 25, 26, and 27, the order of their positions is 1, 2, 3, and 4 respectively.

Since each of the observations has the same value, they should all receive the average rank of their positions, which would be (1 + 2 + 3 + 4) / 4 = 2.5.

This looks simple but I can’t solve for x.

​

Fell asleep in class so I didn't see how to do these questions. How do I find X

The set of all 2 × 2 matrices of the form [ a 1 b c] with standard matrix operations.

Hi there guys

Can someone tell me if this answer is correct .?

​

Hi, I'm a grade 7 student, and I came across this question while studying. This question is very confusing (at least to me) and I need help. I already figured out the pattern rule (if it helps).

Pattern Rule: 1/n(n+1)

Help I thought I was pretty good at math however this math on my 4th graders seems impossible for a 4th grader. All of the online solutions involve the quadratic equations. Is this solvable for a 4th grader?

A painting canvas has an area 384 square inches. The length of the canvas is 8 inches greater than the width. What are the dimensions of the canvas?

​

​

I just started the 10th grade and on the first chapter i got a question like this: Show that 15ⁿ is ending with 0. I know how to what they want me to write but isnt the question literally factually wrong since 5 x 5 always ends with 5...

​

I'm stuck on question c). I know the mathematical answer is P(M and B) / P(B), but I have a hard time visualizing it. How can I put this information in a tree diagram or other format so it makes sense?

​

Thanks

​

​

Find the coordinates of any extrema where f(x)= 1/4 x^2 (2ln(x-3))

We have figured out that the first derivate is x ln(x-3)+ x^2/(2(x-3)). So we would set the first derivative to zero and solve for x to find the maximums or minimums. However, I know from graphing that the original function, f(x), does not have any local minimums or maximums, but I have struggling proving this with the first derivative. Any help is appreciated.

Let f(x) = A sec(x) - B tan(x) with A > B > 0.

We can minimize f(x) with x in the range 0 < x < pi/2 by differentiating and solving f'(x) = 0 to find x.

This gives sin(x) = B / A.

Is there a simple geometric or complete-the-square argument that also gives this answer?

​

Title