Dragonlance

If it look like the way you write it then the answer is 27

If it was like this

6^2/(3*2)+sqr(9)

then the answer is 9

It is negative if you look at the force from the spring. It is positive if you look at the force from gravity. 

It not either one.

It is this. x² +2xh +h²

Thankx Mr. Alan

I use the formula to make the graph and put the points on it.

I just read on the German forum that Radix have a problem too.

Hi Mr. Alan

I been playing with this for 3 hours and this is what I have.

I guess you can read what I do here

But when I solve it and put in the x part it do not equal the y part.

Can you see what I do wrong?

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This is way ahead of where I am in maths.  But it look like a fun one to do.

a quadratic is "y = ax2 + bx + c" a is negative because the parabola is upsidedown.

(-2,2)(0,1)(1,-2.5)

-a(-2)^2+b(-2)+c =2

-a(0)^2+b(0)+c =1

-a(1)^2+b(1)+c =-2.5

a(4)-2b+c=2

0+0+c=1

-a+b+c=-2.5

-----

a(4)-2b=1

a-b=1.5

-----

B=1.5-a

4a-2(1.5-a)=1

4a-3+a=1

5a=4

A=4/5

A=1.2

--------

B=1.5-1.2

B=0.3

--------

A=1.2 B=0.3 C=1

1.2(x^2)+0.3x+1=0

1.2(-2^2)+0.3(-2)+1 not = 0

If it not land on the edge then there are heads and tales and that is two ways each toss can happen. So for 20 toss of the coin it is 2^20 different ways. That is 1,048,576 different ways.

It really not matter if it land on the ground or not as long as it is heads or tails.

This one is not too hard.

Make n the number of time you swim.

Then (80 +1n) =3n

You can tell this is true because if you swim once with a membership then it cost $81. If you swim once without a membership it cost $3. When you solve this it tell how many times you need to swim to break even that is when they equal to eachother. After that you save money.

 (80 +1n) = 3n

3n-1n = 80

2n = 80

N = 40

You break even at 40 times

Anon, CPhill know how to think.

Wolframaplha is a computer it do not know how to think.

I was just thinking anon you are like wolframalpha you do not know how to think either so maybe I need to answer your question. The answers are not equivalent

The first answer is right, except the unit is missing.

It's 5.6 X 10^-5  g