Mathematics

Can a number be a factor of itself

eg 12 and 24 I understand the Highest Common Factor to be 6 but is 1x12 valid making the HCF 12?-A factor of a number is a number that divides it evenly. So of course 12 is a factor of 12, it divides

I have another algebra problem that I'm having trouble with. 13(3-2x)+4(x+1)=7

Im getting confused in what I add together and what I subtract. How do I solve this and what is the rule that will help me with knowing when I add or subtract? Thanks so much for your help.-You never

What are Lissajous knots

http://en.wikipedia.org/wiki/Lissajous_k…-http://www.google.com/search?q=Lissajous…

How do I find x?? D:

3^x = 6^x-1 x = log base3 6^x-1 x = x-1log base3 6 x/x-1 = logbase3 6 x/x-1 = ln3/ln6 ^^^ Thats all ive worked up to! I dont know how to solve for x :(-xlog(3)=(x-1)log(6) xlog(3)=xlog(6)-log(6) xlog

What does it mean to say Rationals and Irrationals are both dense in R

Thanks!-it means that between any two real numbers (no matter how close together), we can find a rational number, and an irrational number.

PreCalculus geometric series problems.?!

PreCalculus geometric series problems.?!? Can someone help me out with ONE or BOTH of these problems please?! Thank you! The sum of 10 + 15/2 + 5 + 5/2 + ... where the associated sequence has 30 term

Let f be defined as f(x) = x if x is rational, f(x) = 0 if x is irrational..

Let f be defined as f(x) = x if x is rational, f(x) = 0 if x is irrational. Show that f is continuous at x = 0 and nowhere else.-f is continuous at x = 0. Note that 0 ≤ f(x) ≤ |x| for all real number

Please solve algebra equation and check

Solve the equations 8+|2x-3|+3x+6. Check your solution-8+|2x-3|+3x+6 = 8+2x-3+3x+6 = 8-3+6+2x+3x = 11+5x-yup! 11+5x is correct. the 2x-3 stays the same because anything inside the lines always stays t

Find the equation of the vertical line passing through ( -6.5, 6.5)

the equation is... i know x=-6.5, y=6.5 but how to put into equation? thanks-any vertical line is always parallel to y axis so that line will have an equation x = c[where c is a constant] in order t

Use subsitute x=a+b to rewrite the trinomial 6(a+b)-17(a+b)-3

what does that mean and how do you do it-Just replace every occurance of a + b with an x 6x – 17x – 3 = –11x – 3-6(a+b)-17(a+b)-3; x=a+b 6(x)-17(x)-3 -11x-3

Factor 3x^2+12xy-63y^2

yeah i am not that good at factoring-Let z = x/y, then 3x^2+12xy-63y^2 = 3y^2( z^2 + 4z - 21 ) = 3y^2 (z+7)(z-3) = 3(x+7y)(x-3y)

Hence, sec^2x = 2 ....? 10 points for best answer

Hi, Im stuck on a question... a) secx = square root of 2 I got 45 and 315 degree for that question.. part b) Hence find, sec^2x = 2 Im stuck on that bit!! Thanks in advance!-a) secx = √2 => 1/cosx =

Can anyone explain to me how to solve this problem

Let g(x)= -x^2+3x-2 and h(x)= |x+2|. Find g(-2)/h(-5)-Lets start with h(x)=|x+2|, |x+2|=x+2 or -(x+2)=-x-2 Because we have two values for |x+2|, well two different answers for g(-2)/h(-5) * first answ

Algebra help please help and show work

the path of a football thrown across a field is given by the equation y=-0.005x^2 + x+ 5, where x represents the distance, in feet, the ball has traveled horizontally and y represents the height, in f

How do you take the derivative of x^(1/5)

please.. im confused. i know i needa subtract 1 from 1/5 and from there im lost on the fractions.-f(x) = x^(1/5) f(x) = 1/5 * x^(1/5 -1) f(x) = 1/5 * x^(-4/5) f(x) = 1/5 / x^(4/5) Hope this is cle