Mathematics

Algebra help! help on a few please

add or subtract 1.) (x^2+4x-1)+(5x^2+2) 2.) (7n^3+2n^2-n-4)-(4n^3-3n^2+8) Find the product. 3.) (3x-1)(5x+1) 4.) (w-6)(4w^2+w-7)-1.) 6x^2+4x+1 2.) 3n^3+5n^2-n-12 3.) 15x^2-3x-1 4.) 4w^3+w^2-7w-24

Please could you include all the steps

Factorise these 2x^2-6x 3a-12-2x^2-6x take x since its common and take 2 so divide everything by 2x since thats the highest common factor therefore: 2x (x-3) so if i multiply this out i will get 2

Help with this algebra involving e constants

I have this equation (5/6) = (1-e^(-2k))/(1-e^(-4k) and Im suppose to solve for k I thought that I would solve it like this: (5/6) = (1-e^(-2k))/(1-e^(-4k)since a^b/a^c = a^b-c (5/6) = (1+e^(2k)

Is doob the only mathematician who is invariant under reflexions about the y-axis

do...|...ob Looks like it !!! Good One ! ___________________-Gr8 Scam, Hypo !Report Abuse

Algebra 1 problem? Help

Cans collected in a recycling project are displayed against a wall and are arranged in a pyramid with 2cans in the top row, 4 cans in the second row, six cans in the third row, and so on. How many row

9x^3+7x-3(2x^3+2x) how do I solve this

9x^3+7x-3(2x^3+2x) multiply -3 (2x^3+2x) 9x^3+7x-6x^3-6xadd or subtract like terms 3x^3+x-9x^3+7x-3(2x^3+2x) BIDMAS (Brackets, Indices, Division and Multiplication, Addition, Subtraction) So first o

What are cos(n*π - π) and cos(n*π + π) n is integer, always equals to

I know that cos(n*π) = (-1)^n but what about these two?-Siπ=0 Cosπ=1 Cos(nπ-π)=Cosnπ Cosπ+Sinnπ Sinπ=Cosnπ=-(-1)^nfor n>=0 Cos(nπ+π)=Cosnπ Cosπ-Sinnπ Sinπ=Cosnπ=-(-1)^nfor n>=0 Cosnπ=-(-1)^n-All of

How do you find the equation of the line that is tangent to the curve

Find the points on the graph that have tangent lines with the given slope. f(x) = 16/x-6, m=-4 No matter what I try, I cant find the correct answer. I guess its my algebra.. I know that you have {(1

68-95-99.7 Rule, please explain

Im reviewing the 68-95-99.7 rule in my statistic math course and dont get it. Can someone explain it to me? The question is: The heights of a large group of people are assumed to be normally distrib

Draw the graph of y=2x+1 on the grid?

I dont understand how to do these can someone please help I have to understand by 2moro morning :(-This is a fun process.:) 1.) Create a table of values to use.Pick some easy numbers for x like -1, 0

How do you rewrite y=4x^2+16x+7 into the standard form of polynomials

This is standard form for polynomials-4x^2+16+7=y or y=4x^2+16+7

Simplifying (Sqrt (5+x) - (Sqrt 5))/x

Can anyone help me. Ive been trying for the past hour to solve this but i dont know how. Can someone tell me how to do this, please.-(Sqrt (5+x) - (Sqrt 5))/x = (Sqrt (5+x) - (Sqrt 5))(Sqrt (5+x) + (S

A circle of radius 4 is inscribed into quadrilateral with 3 known sides 6, 14, 16, what is area of the quadri

What is the area of this quadrilateral?-Take a look at this link here: http://en.wikipedia.org/wiki/Tangential_… By the Pitot Theorem, if x is the fourth side of the quadrilateral, then: 6 + 14 = 16

Taking Applied Partial Differential Equations and calc 3 at the same time

Does it matter? Im in my 3rd year, due to bouncing around majors my class schedule is kind of wacky. The preeqs for PDE is DE and Linear Algebra, both of which Ive taken, but ill be taking calc 3 in

If 750 million people saw a advertisment to donate 25 dollars to your paypal account what are the odds...

If 750 million people saw a advertisement to donate 25 dollars to your paypal account what are the how many people out of 750 ML would do it what are the odds?-If it was just to donate 25 dollars, I w