Mathematics

Confused with geometry, help please

It says: Study the two lines given below. How can you describe the graphs of the two lines? Justify your conclusions. 11. 4x = -16 - 3 y 8y - 13 = 6x I changed them both to standard form but Im not

Find the derivitive of this calculus problem

y=(cos3)x^2-more proper: y = 2cos(3)x-2cos(3)x

How do I differentiate ux with respect to x

I have y = ux So dy/dx = ddx ( ux) Then how do I differentiate ux with respect to x....THANKS-looks like something from homogeneous DE y = u(x) x ----> dy = u dx + x du

Topic maths series? Need help

find the of the term which is independent of x in the expansion of (x+3/x)^4 please explain this-The expansion of (a+b)^4 has terms of the form (4Cr)x^r(3/x)^(4-r) and to be independent of x , x^r=x^

Can someone explain to me how to do this please

I am not looking for answers I just need help understanding how to do this? Solve the following equation: 5 + {6 + 2 x (3 + 9)} = 38 93 74 101 35-I have no clue what that random list of numbers means

Use a special factoring formula to factor the expression. 8x^3+y^3

8x^3+y^3=(2x+y)(4x^2-2xy+y^2)-(a^3 + b^3) = (a + b)(a^2 - ab + b^2) This is the one you want. It should be in your textbook along with others.

How long ago is 688BC

In years. Thanks in advance.-You mean from the present time? That was 2698 years ago. 2011+687=2698. BC means years before the year 1. Remember that there was no year 0. Thats why I added 687 years in

Answer this derivitive problem

y=cos(3x)^2--6sin(3x)cos(3x)-y = -6sin(3x)cos(3x)

Radical equation question

I keep ending up with x = -5 and x= 1 .. but it is supposed to be x=5 and x=1. Solve: x-2√(x-1) = 1 (x-2√(x-1))² = (1)² x² +4(x-1)=1 x² + 4x - 4 =1 x²- +4x -5 = 0 (x+5)(x -1 )=0 x = -5, x = 1

Evaluating integrals and seeing if they converge

How do I evaluate the integral From -1 to 2, the integral 1/x^2 dx-This is the same as the integral of x^(-2) dx. The integral of x^n dx is x^(n+1)/(n+1) for any n except -1.

How many orbitals are in the n equals 4 shell

For the Principal quantum number n = 4,we have the 4th shell of whichthe Orbital quantum numbers are l = 0, 1, 2, and 3,n=4, l=0 is called 4s ; n=4, l=1 is called 4p ; n=4, l=2 is called 4d ; n=4, l=3

Trial and error math question help

How can you get 100 items for one dollar? Pencils: 10 cents each Erasers: 5 cents each Paper clips: 2 for a penny-90paper clips90*.005=0.45 1pencil1*.10=0.10 9erasers9*.05=0.45 1001.00 *=times

How to use algebra to find out if f(x)=2x^2/6x^4+1 is even, odd, or equal

Could someone explain how to do this because I have no idea :/-even function , since f(-x)=f(x)-since f(-x)=f(x) for more help visit link: http://math.tutorvista.com/algebra/algeb… http://en.wikipedia

What is the derivative of sec(x)

sec(x)tan(x) remember it by sexy tan-The derivative of sec(x) is sec(x)*tan(x)

In Maple, how would you find all the real and/or complex roots of this quartic function

In Maple, how would you find all the real and/or complex roots of this quartic function? 14*x^4 + 70*x^3 + 160*x^2 + 80*x - 221-> fsolve(14*x^4+70*x^3+160*x^2+80*x-221, x, complex); -2.378334921, -1.7