# Idealist

### What's the correct mathematical expression for a<0 and d<0 at the same time in an equation?

Assume that in an algebraic equation is true for a>0, d>0. But if a<0 and d<0 at the same time, then this algebraic equation is also true, what's the correct mathematical expression for a<0 and d<0 at the same time in an equation?

2 AnswersMathematics4 weeks ago### Is College Algebra the same thing as Linear Algebra?

Is College Algebra the same thing as Linear Algebra? Or is it the same thing as Algebra II?

4 AnswersMathematics2 months ago### What exactly is advanced engineering mathematics? Do math majors have to take this class/course in college?

Or it's only required to take for engineering majors at college?

3 AnswersHigher Education (University +)2 months ago### How to find the null space of a matrix on Ti-89 calculator?

I couldn't find the command to find the null space of a matrix on Ti-89 calculator. Does anyone know how to do it? Thanks.

1 AnswerMathematics2 months ago### Is Statistics really necessary/mandatory to take for college math majors?

If a college student is a mathematics major and his/her goal is to take the most challenging mathematics class at college, then is statistics really necessary/mandatory to take at college even though he/she finished taking differential equations already?

8 AnswersHigher Education (University +)2 months ago### Why are college students taught by graduate students in 4-year public universities?

Shouldn't 4-year universities hire professors who already obtained PhD's in their fields and those who have teaching experiences? Why do they allow graduate students to teach undergraduate students in a large room with sometimes more than 150+ students? Can undergraduate students learn like that? In such a crowded classroom? What if they sit in the back of the room and cannot clear hear/view the instructor? How come community college class sizes are much smaller compared to the class sizes of 4-year universities?

6 AnswersHigher Education (University +)3 months ago### Is it true that Ivy League schools' professors are the easiest graders?

I've heard that the professors at Ivy Leagues are the easiest graders, but is it true? Why or why not?

3 AnswersHigher Education (University +)3 months ago### What's the ultimate reason people desire to get into prestigious colleges/universities in the US?

I've seen many students who want to get into prestigious colleges/universities in the US and I wonder why. Do top schools like MIT, Harvard, Yale & Stanford have better professors and they teach better than other colleges/universities or what? What benefits do students get from those elite schools? Will employers choose people who graduated from elite colleges rather than regular state schools? What exactly is the difference? Do elite colleges/universities provide best higher education or all colleges/universities teach the same materials in the US? Why top elite colleges/universities are selective than other schools? Why other colleges/universities aren't that selective at all?

2 AnswersHigher Education (University +)4 months ago### Can teachers/professors see students' entire body (up to the student's whole room) in Zoom?

I know that they can see students' screens but up to how much can they see their students? Because on the screen, only up to the chest can be seen by students from their view. Can teachers/professors see students' entire body (up to the student's whole room/whole surrounding) in Zoom?

3 AnswersTeaching4 months ago### What kind of class/course is COMM 121 (Interpersonal Communication) that's taught at a community college?

I'm in community college and due to the COVID-19 pandemic, I must take COMM 121 (Interpersonal Communication) that's online in the fall semester of 2020. My major is accounting and my counselor told me that this class is a requirement for me to transfer to a 4-year institution. What should I expect from this class/course? I've never taken any communication related class/course before. Is it easy or hard? For those of you that have already taken this class/course before, can you please explain and tell me your experience about it? Thank you.

4 AnswersHigher Education (University +)4 months ago### Help me with this math problem?

This is about finding the power series solution to a differential equation using power series substitution. I only know what's y, y' and y". After I substitute them into the differential equation, I don't know how to get to all those steps below. I got stuck on the fourth line of the problem. Can someone please help me with this and tell me how to sum up and shift the indices. Thank you.

1 AnswerMathematics5 months ago### How to set up a Wifi username and password for a new laptop?

I will get a new laptop soon and was wondering how to set up a Wifi username and password in order to log in and do my homework, etc. Right now, I'm using the same password from my house owner in where I live. But this time, I don't want to use that old password again. I want to create something new for this laptop. How to set up a Wifi username and password for a new laptop? Does it cost money, if at all?

3 AnswersLaptops & Notebooks6 months ago### Are transfer applicants required to submit recommendation letters from their professors in order to transfer to 4-year college/university?

I'm currently attending LACC and I want to know the admission requirements for transfer applicants into 4-year colleges/universities. Besides completing at least 60 units at a community college, what else is needed/required in order to transfer? Do they also require transfer applicants to take the SAT/ACT and submit recommendation letters from their professors or those are only for freshman applicants? I'm looking for Cal State LA or CSUN to transfer.

3 AnswersHigher Education (University +)6 months ago### How to have my camera on during the supervised examination?

I'll have an exam soon and my professor wants us to have our cameras on during the supervised examination since we'll have to take the exams online due to COVID-19. But I don't know how to put on my camera, how do I do this? Do I have to check my webcam on my desktop or anything?

3 AnswersOther - Internet6 months ago### Help me with this math problem?

How to solve this equation?

2^(x)+3^(x)=13

I know that the answer is x=2 but what are the ways of solving this type of problem?

4 AnswersMathematics10 months ago### Find the integral?

Evaluate the integral 7/(w^2+3w+3) dw.

Here's my work:

I've completed the square and came with this:

integral of 7/[(w+3/2)^2+3/4] dw

where u=w+3/2 and du=dw.

After I substitute, I got

integral of 7/(u^2+3/4) du.

From here, I don't know what to do. I know that I'm supposed to do the inverse tangent, but I don't know how. Can anyone please tell me how to get to the correct answer from here? Please show your work. Thanks.

2 AnswersMathematics1 year ago### Help me with this math problem? (Please check my work.)?

1 AnswerMathematics1 year ago### Help me with this math problem?

4 AnswersMathematics1 year ago### Help me with this math problem?

Find the arc length of f(x)=x^(3/2) on [0, 2].

2 AnswersMathematics1 year ago### Help me with this math problem?

How to integrate this integral? I've tried the partial fraction decomposition method but it doesn't seem to work at all. Please show all your work. Thanks.

1 AnswerMathematics1 year ago