Math Help

Archive for May, 2009

Question: Where can I find FREE Math (Elementary Algebra) help websites?

Or can any one help with this Find the equation of the line perpendicular to 2x+4y= -1 through the point (-1,3). Write equation in slope-intercept form.

Answer: http://www.purplemath.com/modules/index.htm is a good web site for algebra.

Math Help : What Math Do Actuaries Use?

Question: Two more little Johnny jokes (while he was still in nursery school [kindergarten]).?

1) Little Johnny goes up to his teacher and said ” Sir, there’s a dead cat out in the yard.”
His teacher asked “How do you know it’s dead Johnny?”
“Cos I pissed in it’s ear, Sir.”
“WHAAT?…YOU DID WHAT?”
“I bent down and said ‘Pssst’ in its ear and it still didn’t move a muscle.”

2) Little Johnny was doing some maths homework and he was reciting to himself..”Two and three…that son of a b i t c h is five,
five and four…that son of a b i t c h is nine…”
“Who taught you that Johnny?” asked his mother crossly.
“Mr Smith, my maths teacher” said Johnny.
His mother went into the school the next day and confronted Mr Smith “Did you teach Johnny to say ‘four and five…that son of a b i t c h is nine?”
“Of course not,” said the teacher…”it was four and five, the sum of which is nine.’”

Answer: A male patient is lying in bed in the hospital, wearing an oxygen mask over his mouth and nose. A young, student nurse appears to give him a partial sponge bath.

‘Nurse’, he mumbles, from behind the mask. ‘Are my testicles black?’

Embarrassed, the young nurse replies, ‘I don’t know, Sir. I’m only here to wash your upper body and feet.’

He struggles to ask again, ‘Nurse, please check. Are my testicles black?’

Concerned that he might elevate his blood pressure and heart rate from worry about his testicles, she overcomes her embarrassment and pulls back the covers. She raises his gown, holds his penis in one hand and his testicles in the other.

Then, she takes a close look and says, There’s nothing wrong with them, Sir!’

The man pulls off his oxygen mask, smiles at her and says very slowly, ‘Thank you very much. That was wonderful, but, listen very, very closely……

A r e – m y – t e s t – r e s u l t s – b a c k?

Teaching Kindergarten Math : How to Teach Kids Subtraction with Circles

Below are forecasting techniques often used in Operations Research.

For series without trend and seasonality.

Model: where:

is independent and

Moving Average

Where

	= an estimate of M made at time t
N	= observations (given equal weight)
	= new observation

Single Exponential Smoothing

Include all past data and give greater weight to more recent observations.

Where St = exponentially smoothed average at time t and

And,