Mathematics

Math questions.... please hellppp!!!!

1 --- What is the axis of symmetry of the graph of y = 2(x – 3)2 – 7? 2 --- What are the x– and y–intercepts of the graph of y = 2x2 + 6x + 4?-2)by using the quadratic formula you get x intercepts ar

Need help in excersise...

HI... I dont understand this excersises... can someone.. do it for me.. and the explain it to me please... thanks!!!! 1 ---Solve: 2x^2 = 14x + 20 and 2 -- Solve: 3x2 + 4x = 2... (this one I need t

Is there a decent online graph drawer

Im looking for a graph drawer but most of them cannot draw what i want, like, x^2 + (y-1)^2 = 1. Do you know any decent one?-WolframAlpha does a fair job. http://www.wolframalpha.com/input/?i=x%5… .

Some free sites where i can practice fractions

i need loooots of help thanks-khanacademy also has great references for the practice you need-purplemath.com or http://www.mathwarehouse.com/fractions/

Reduce 15/36 by multiplying the numerator and denominator by 1/3

I will try to set the problem up as best I can. Yahoo moves the top 1/3 fraction a little over to the left for some reason. Its suppose to be right no top of the other. 151/3 ---- X 1/3 = 5/12 36-Ini

Prove that it is impossible to write x = f(x)g(x) where f and g are differentiable and f(0) = g(0) = 0.

Hint: Differentiate I normally am giving math help around here but a student in my tutorial posed this question and Im unable to help him out. Any help would be appreciated. Thank you. :)-Differentia

Free math tutor online please help

ty 10pts-khanacademy!-There isnt any online Ive searched before And if you get a tutor get a real person not a computer, interaction between ppl will make it seem easier

Small statistics problem..

1) Let X and Y be in independent standard normal random variables, and define a new rv by U = .6X + .8Y. a) Determine Corr(X, U). b) How would you alter U to obtain Corr(X, U) = p for a specified va

Quadratics excersises!

I need to do some excersises I dont understand about quadratics.... pleasee helpp... :D 1) Quadratic equations that can be solved by factoring can also be solved using the quadratic formula. (always,

Algebra factor problem

how can you factor x^3-3x^2-2 = 0 ?-The only possible rational roots are +/-1, +/-2 since none of these give zero, then it does not factor.-The equation has a real root between 3 and 4 (an irrational

A problem of skiing really confusing

it was skiing resort in switzerland.i met a skiing enthusiast by the skiing slopes.he asked me to join him for lunch back in the spot where we were standing at 1pm after he had done a bit of skiing. i

Algebra HELP......?!

So...I just blanked out and I cant seem to remember how to write the algebra expression for this problem (lol...) :D Suppose an airplane is climbing at a rate of 30 feet per second. Write an algebra

Solve this differential equation

following equation is this : (y - y^2 - x^2)dx - xdy = 0-y–y²−x²= xy −1 − (x/y)² = xy/y² − 1/y = d(−x/y)/dx Put z = x/y so DE becomes −1−z² = −dz/dx→dz/(1+z²) = dx Integrate:tan‾¹ (z) = x+c→z=tan

Rationalize all denominators 1 / ∛(18x^4)

1 ------------------- ∛(18x^4)-1) I suppose, the denominator is ∛(18*x^4)? ==> ∛(18x^4) = (x)*∛(18x) 2) Multiplying by 12*x² the part inside the cube root, it changes as: (x)*∛{(18x)(12*x² )} = (x)

Easy math help 10pts thanks

7x + 6 = -5x + 10-12x = 4 x = 1/3-7x+6=-5x+10first get xs on same side of equation by additing 5x to both sides 7x+5x+6=-5x+5x+10combine the xs 12x + 6 = 10now subtract 6 from both sides 12x = 4solve