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What is the answer/process for x + 1/x = 7

Moreover, what process does it represent? What is the name of the division of mathematics this kind of problem belongs to? For example, 2 + 3 would be called a simple addition problem. Thanks!-This

Statistics Help! (using contingency table to determine Independence/dependence)

For my statistics class we have to set up a contingency table. From my table, I found the following: chi-square = 1.41 degrees of freedom = 2 probability = 0.495 what I need help with is how do i de

Imaginary (Complex) Number Question

I need help solving this. -2(x+1)^2=72 I think the answer is x=7i or x=-7i, but I am unsure. I get as far as x + 1= -6, but I am unsure as to what to do to the +1.-Ok so, start by dividing both sides

Mathematics probability (statistics 1) help?????!

of the students in a year who took maths : - 50% took physics - 35% took chemistry - 40% took neither physics or chemistry 1 pupil is chosen at random: 1) find the prob. that the pupil took physics

How to solve distance problems with unequal rates and time.

Ive had difficulty with these mostly because my teacher usually stops half way through the problem for us to figure it out for ourselves, which I cant seem to do. So, Bob goesX-distance down a river/

How would I 'verify' this problem in pre-calc/trigonometry

(sin^2a) - (sin^4a) = (cos^2a) - (cos^4a) This (I think) would be spoken as sine squared of a minus sine to the fourth of a equals cosine squared of a minus cosine to the fourth of a. Please show st

How could you solve this 38h^3+h^2-5=0 what is the value of h show me the steps.

38h^3+h^2-5=0 (2h-1) is the factor the final answer is 1/2 digout-it factors into (2 h-1) (19 h^2+10 h+5) = 0 then you can set each polynomial equal to zero, you only end up with one real solution

Why is it called Radical?(Math)

What does Radical mean?-Radical comes from Latin radicalus which means of the root so the radical sign symbolises going back to the roots, or the foundation of the number. The same meaning, slightly

Are these numbers odd or even? 10 pts. best answer! :)

586 remainder 2 307 remainder 9 500 remainder 7 470 remainder 7 583 remainder 4 357 remainder 4 252 remainder 3 404 remainder 7 226 remainder 3 Thanks so much! :)-Izzy, Get in touch and tell me what

How do i find the solution to 2sin^2 x − sin x − 1 = 0

You might want to call y = sin x for a while, so that it looks less confusing. Then you have: 2y^2 - y - 1 = 0 You can either factorize or use the quadratic formula to find y. Ill factorize using an

Help with special functions please! anyone

I have 2 word problems in my homework that I dont know how to do..... u.u Im studying special functions in school would any one help me please? ;D I need to find out how to do them in case we have a t

Quadratic Function Question.

A rectangular field with an area of 8000m² is enclosed by 400 m of fencing. Determine the dimensions of the field to the nearest tenth of a metre. It has to be solved using a quadratic equation.-L+W

Use a linear approximation (or differentiation) to estimate the given numbers.

a) (1.999)^4 b) cube root of 1001 c) 1/4.002 Need help! Even if you answer one of these that would be great.-linear approximation of a function f(x) at a point a is f(x) = f(a) +f(a) (x-a) where x is

Is this statement true or false

I need to determine if the following statement is true or false. If its false i need to disprove it and if its true i need to prove it. Suppose a is an integer and p is a prime number such that p div

I don't understand linear programming

A furniture company makes chairs and sofas. It takes 7 hours to build a chair and 4 hours to build a sofa. It takes 4 hours to upholster a chair and 8 hours to upholster a sofa. There at most 112 hour
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