# operations

1. ### Algebra (Solving equations with 2 operations) plz help i need this done in 10 mins!!!

i need help to show my work i know the answers jus not kno how to show the work here are the following questions. first question -5 2 second question 6x-4=-10 third question 9=2y+9 fourth question -10+a/4 =9 fifth question 17=5-x PLEASE DO THIS...
2. ### Order of operations with limits

Just this morning I reminded someone about using parentheses. So just to prove how anal I can be, I'd like to ask the following question about a post I just saw. Is \lim_{x \to a} f(x) + g(x) equal to \lim_{x \to a}(f(x) + g(x)) or \left [ \lim_{x \to a}f(x) \right ] + g(x)? -Dan
3. ### What is wrong with these operations? My calculator produces a different answer

In this book I'm reading, there are three problems I'm having a hard time with. 1. \sqrt{12}\times\sqrt{5}=\sqrt{60}=2\sqrt{15} When I enter \sqrt{12}\times\sqrt{5} on my TI-84+ and hit Enter, I get 7.745966692 instead. 2. 3\sqrt{2}\times4\sqrt{8}=12\sqrt{16}=48 When I enter...
4. ### Matrix Operations, determinnat and inverse

Dear All, I need help on following question related to matrix.. Thanks,
5. ### probability question: operations and joint distributions

A system consists of two components. Suppose each component is subject to failure at constant rate c, independently of the other, up to when the first component fails. After that moment the remaining component is subject to additional load and to failure at constant rate 2c. a) Find the...
6. ### Operations on 2 vector fields

Supposing we have as 2 vector fields: F = x^2i + 2zj +3k and G = r^2e_r + 2\cos\Theta e_{\Theta} + 3\sin(2\phi) e_\phi how do i perform the following operations on them? - F\cdot r - F\times r - |G| - G\cdot r
7. ### Elementary Row Operations

Ok, here is one of the questions I have. I have several but I will just do one at a time. Please reply if you can help me with steps or answer or anything. Like I said, I am new at this but I thought it might be helpful. Thanks in advance for the help. Use Elementary row operations to write the...
8. ### Elementary row operations

Ok, here is one of the questions I have. I have several but I will just do one at a time. Please reply if you can help me with steps or answer or anything. Like I said, I am new at this but I thought it might be helpful. Thanks in advance for the help. Use Elementary row operations to...
9. ### set operations

What is the difference between the union of two sets and the intersection of two sets. Give an example of each
10. ### Operations I

I have a question for which I need help: Let M consist of all 2*2 matrices of the form [a b] [-b a] Show that the product of the two matrices in M is a matrix in M. Here's my attempt: [a b][a b] = [a^2-b^2 ab+ab] [-b a][-b a] [-ab-ab...
11. ### row operations

5 math ?'s Need Help URGENT!!! questions on attachment!!
12. ### Reverse Order of Operations vs. Order of Operations???

How do I know which one to use with an equation..??? Thanks... Aimee
13. B

### Order of operations

I need super big help On my math homework there are problems that confuse me... 1) -[21 + (-7)] = ( -9 +11) = ;) Help!!!!!!!
14. ### Order of Operations

Please help me! Hi all... I hope that someone can help me with this... I just can´t figure it out... :confused: 5a-{-[(-3a+2b)-4b]+[-7a-(a-b)]-3b} and this one... 4c-{(-6d-3c)-[(-8c-11d)-5c+9d]}
15. ### Order of Operations

Hi I don't understand how to evaluate this: 2 x 10 - 3 x 2 + 12 ÷ 2