Mathematics

Standard form question

So I know that it is Ax + By = C Say I have -3x + y = 3 Is it acceptable to write it as 3x - y = -3? Or is that just plain wrong?-Actually in standard form, A should be positive. So 3x-y=-3 is better

The year 2003 is a prime number. What is the next year that is a prime number

The year 2003 is a prime number. What is the next year that is a prime number? Not sure how to get the answer to this. Please help.-I just googled a list of prime numbers... 2011 is the next (this ye

Does any body know about number sequences Please help? 10 points!

i need a definition of palindromic numbers, fibonacci sequence, pascals triangle, square numbers, triangular numbers and the sieve of Eratosthenes.i know what they are but i really dont understand our

3D Trigonometry problem

This is the problem given: The side of a hill faces due south and is inclined to the horizontal at an angle alpha. A straight railway upon it is inclined at an angle beta to the horizontal. If the bea

Solve (tan(x))/(1+sin(x))+(cos(x))/(1-cos(x))=cot(x)+sec(x)csc(x)

Help me solver this please! (tan(x))/(1+cos(x))+(sin(x))/(1-cos(x)…-tan(x)/(1+cos(x)) + sin(x)/(1-cos(x)) => ( tan(x)(1-cos(x)) + sin(x)(1+cos(x)) ) / (1 - cos^2(x)) => ( tan(x) - sin(x) + sin(x) + s

How do you solve this quadratic equation

5x(squared)+16x-84=0 preferably if you could show me step by step using the quadratic equation. with answers please! thank you-formula: -b+√(b^2-4ac)2a a = 5, b = 16, c = -84 plug in: -16+√(16^2-4(

SAT math segment problem? 10pts LAST QUESTION I DONT GET ON MY PREP HW!! PLEASE HELP D:

http://tinypic.com/view.php?pic=2mnjg51&s=7 i made PQ, QR, and RS = x which would mean ST = 2x but then 5x does not go into 36 ... T_T-Great job that you got it right, so far. 5 does not go into 36,

An algebra math question that i need help on

an automobile radiator contains 16 litres of antifreeze and water. this mixture is 30% antifreeze. how much of this mixture should be drained and replaced with pure antifreeze so that there will be 50

How do solve this quadratic equation

5x(squared)+13x-1=0 USING THE QUADRATIC FORMULA please show answers too thank you!-http://www.mathwarehouse.com/quadratic/quadratic-formula-calculator.php Quadratic equation calculater online. Merry

Local extrema/ relative maxima and minima

For the function y = x^3 - 3x^2 - 9x +15? I solved and found an absolute max at (-1, 20) and absolute min at (3, -12). Does it even have a local max/min?-Since this is a cubic, which goes in both dir

Math Trigonometry Easy 10 Points, Please answer. Part 3

http://img30.imageshack.us/img30/3766/32313147.png ^Can you please answer these math questions? easy 10 points.-You have to make a rectangular fish pond (2ft x 3ft x 3ft) where the length is 2ft, the

Can you please help me to understand how heavy 700lbs is

Im not good at math really! Which heavy object would be 700lbs? It might help me to know what this weight is.-If you weigh 175 lbs. Then its exactly four of your size.-half ton man (extremlyobese pers

How to prove Integral [ f(tan(x)) , from 0 to Pi/2]dx = Integral[ f(cot(x)) , from 0 to Pi/2]dx

While knowing Integral [ f(sin(x)) , from 0 to Pi/2]dx= Integral[ f(cos(x)) , from 0 to Pi/2]dx-Let z = π/2 - x x = π/2 - z. So, dx = -dz. Bounds: x = 0 ==> z = π/2, and x = π/2 ==> z = 0. Moreover,

What is Miwin's dice

Miwins Dice were invented in 1975 by the physicist Michael Winkelmann in Vienna. They consist of three different dice with faces bearing numbers from 1 to 9, with opposite sides summing to 9, 10, or 1

Help me rationalize the numerator

[(√x+1) +1]/x please show work so that I can understand^^ Im doing a calc prerequisite packet and am stuck on this problem-[(√x+1) +1]/x ===> by the multiple of [(√x+1) - 1] / [(√x+1) - 1] [(√(x+1) +