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Type: Posts; User: iamthetman

1. ## Question: List all possible samples of a population of 1,3,5 and a sample size of 2 with replac

by iamthetman
1
Views
1,300

### Don't ask the same question twice.

Don't ask the same question twice.
2. ## Question: Of a population of 1,3,5 and a sample size of 2 with replacement. List all samples

by iamthetman
1
Views
430

### So you need to pick 2 numbers since that is your...

So you need to pick 2 numbers since that is your sample size. On your first pick, you can select 1, 3 or 5. Then on your second pick you can still select 1, 3 or 5 since it says 'with replacement'....
3. ## Question: Precise and accurate

by iamthetman
2
Views
2,623

### Precision is defined as: The ability of a...

Precision is defined as: The ability of a measurement to be consistently reproduced.

Example: I can throw a dart at the dartboard and hit a triple 20 every time even though I'm trying to hit the...
4. ## Question: Stoichiometry

by iamthetman
3
Views
1,032

Well to start with, think about how many cookies you could get if you had only 1000 cups of flour and an infinite amount of every other supply. That would mean you could make 1000/2.25 batches of...
5. ## Question: Solving systems with exponents using elimination?

by iamthetman
1
Views
2,044

### Try multiplying the entire second equation by -3...

Try multiplying the entire second equation by -3 and then add the two equations together. You'll notice that you've "eliminated" the 'x' terms.
6. ## Question: Statistics symbols

by iamthetman
2
Views
8,433

### You have the null hypothesis and the maximum...

You have the null hypothesis and the maximum allowable error mixed up in the top section.
7. ## Question: Finding Slope

by iamthetman
1
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829

### Try drawing the line on a graph first. You'll...

Try drawing the line on a graph first.

You'll notice that it's a straight horizontal line.

Since slope is rise over run and there is no rise the slope is zero.
8. ## Question: What Should I Do Next?

by iamthetman
16
Views
1,439

### I guess the due date for the homework has passed...

I guess the due date for the homework has passed so it's no use for PAK anymore...
9. ## Question: Verifying trig identities

by iamthetman
3
Views
695

10. ## Question: Geometric Mean

by iamthetman
1
Views
936

So there's 8 years of increase. You start with 14,968,000 and end with 66,290,000.

The compounded increase per year would be:

14,968,000 * (1 + rate increase per year)^8 = 66,290,000

Then...
11. ## Question: Substitution & Elimination Problems

by iamthetman
4
Views
4,989

### Elimination: Multiply the entire second...

Elimination:

Multiply the entire second equation by -1 to get: 10x + 2y = -8

Now add equation one and the new equation two together to get:
13x = -6 -> x = -6/13
Throw x back into one of the...
12. ## Question: Substitution & Elimination Problems

by iamthetman
4
Views
4,989

### Substitution: Rearrange first equation: 3x - 2...

Substitution:

Rearrange first equation: 3x - 2 = 2y
Then substitute into second equation: -10x - (3x - 2) = 8
Then group like terms and solve: -13x = 6 -> x = -6/13
Throw x back into one of the...

by iamthetman
3
Views
965

### So much for not spoon feeding the answer to him...

So much for not spoon feeding the answer to him...

by iamthetman
3
Views
965

### If you know how to do one then you should know...

If you know how to do one then you should know how to do the other.
Here's what you would do for the first one:

let x be the length of the rectangle.
let y be the width of the rectangle.

So...
15. ## Question: Sample Data - Range and Mean

by iamthetman
1
Views
1,192

### The sample data are identical in sample number 5...

The sample data are identical in sample number 5 since there is no range.
16. ## Question: What is the name given to foods with no nutritional value

by iamthetman
1
Views
816

Junk food?
17. ## Question: Mothers' Day

by iamthetman
5
Views
979

### Cook it on a lower temperature and don't cook it...

Cook it on a lower temperature and don't cook it for too long!
18. ## Question: Math 212 homework

by iamthetman
2
Views
1,054

### Now that you've fixed part 3 and you have the...

Now that you've fixed part 3 and you have the solutions to the other questions, you should be able to solve part 3 on your own... considering this is your take home final.
19. ## Question: Physics/trignometry 140N and 35 deg

by iamthetman
4
Views
876

### I thought so.

I thought so.
20. ## Question: Present value

by iamthetman
2
Views
1,034

### Here's how to solve: You have to discount all...

Here's how to solve:

You have to discount all future cashflows back to the present value.

So PV of the \$2 dividend at the end of the first year is 2/(1+11%).
PV of the \$2.20 dividend at the...
21. ## Question: Physics/trignometry 140N and 35 deg

by iamthetman
4
Views
876

### I agree with the horizontal component. The...

I agree with the horizontal component.

The vertical component would be 140sin(35).
22. ## Question: Square completing

by iamthetman
6
Views
1,024

### y = -x^2 + 8x - 12 -y = x^2 - 8x + 12 -y = (x^2...

y = -x^2 + 8x - 12
-y = x^2 - 8x + 12
-y = (x^2 - 8x +16) + 12 - 16
-y = (x-4)^2 - 4
y = -(x-4)^2 + 4
23. ## Question: Probability.with counting

by iamthetman
4
Views
1,007

### For the question about the class picture: ...

For the question about the class picture:

First think about how just the girls can be arranged. You should be able to write all the different possibilities. You'll find that there are 4! Ways of...
24. ## Question: Probability.with counting

by iamthetman
4
Views
1,007

### The second is extremely simple if you understand...

The second is extremely simple if you understand the answer to the lottery question you asked. You have 10 people from which you can selecct and you must select 3 members. 10 choose 3.
25. ## Question: Probability.with counting

by iamthetman
4
Views
1,007

### Have you attempted these questions on your own...

Have you attempted these questions on your own first?
You won't learn much unless you've thought about these before asking us.
26. ## Question: How do you solve/graph this. ABSOLUTE VALUE?

by iamthetman
7
Views
8,078

### So essentially what you have is this: x=3 ->...

So essentially what you have is this:
x=3 -> y=-2
x=2 -> y=-1
x=1 -> y=0
x=0 -> y=1
x=-1 -> y=2
x=-2 -> y=3
but then when you get to x=-3 you notice a change:
x=-3 -> y=2
x=-4 -> y=1
27. ## Question: Probability with the lottery

by iamthetman
2
Views
1,558

### Grand prize: 1 / 40 choose 6 for one set of six...

Grand prize: 1 / 40 choose 6 for one set of six numbers so 2*(1 / 40 choose 6) since you get to select two sets of six numbers with one entry.

No winning Numbers: 34 choose 6/ 40 choose 6 for...
28. ## Question: How do you solve/graph this. ABSOLUTE VALUE?

by iamthetman
7
Views
8,078

### Plot the points on a graph. x=3 -> y=-2 x=2 ->...

Plot the points on a graph.
x=3 -> y=-2
x=2 -> y=-1
x=1 -> y=0
x=0 -> y=1
x=-1 -> y=2
x=-2 -> y=3
x=-3 -> y=4

You'll notice that you have a straight line!
29. ## Question: Balancing equations in Stoichiometry

by iamthetman
1
Views
851

### Al2S3 + 6H2O = 2AL(OH)3 + 3H2S

Al2S3 + 6H2O = 2AL(OH)3 + 3H2S
30. ## Question: Probability of getting an ace from 50 cards if 2 cards are randomly removed from 52

by iamthetman
6
Views
5,684

### Actually this is a case for conditional...

Actually this is a case for conditional probability.

Here's how you solve conditional probabilities:
P(A) = P(A|B)xP(B)

P(getting ace from 50 cards) = P(getting ace from 50 cards|4 aces...
31. ## Question: How do you slove this

by iamthetman
1
Views
1,903

### You have a v in the denominator so start by...

You have a v in the denominator so start by multiplying everything through by (v+2). Then expand and group all the like terms. Then use the quadratic formula to solve for the values of v!
32. ## Question: Probability in statistics

by iamthetman
3
Views
1,394

### To determine whether it's unusual, look at how...

To determine whether it's unusual, look at how many people have it vs. how many people you would expect to have it.

For A: 5 people actually have that blood type
You'd expect 45 x 6% of people to...
33. ## Question: How to find vertices and foci

by iamthetman
4
Views
5,022

### For what type of shape?

For what type of shape?
34. ## Question: Finding an equation being given the foci and the directrix

by iamthetman
1
Views
1,253

### x = (y+1)^2 + 3

x = (y+1)^2 + 3
35. ## Question: General Chemistry

by iamthetman
2
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1,232

36. ## Question: Conics, ellipses and hyperbolas

by iamthetman
3
Views
3,661

### Your ellipse looks perfect. The next step might...

Your ellipse looks perfect. The next step might be to graph it.

Your hyperbola has a mistake in it. Going from line 1 to line 2 you forgot to change -54x to +54x since you factored out the...
37. ## Question: Center & Radius Circle

by iamthetman
2
Views
1,245

### Well, the standard form for the equation of a...

Well, the standard form for the equation of a circle is x^2 + y^2 = r^2 where the centre of the circle is (0,0) so putting your equation into this format would give you the answer to both your...
38. ## Question: Balancing equations

by iamthetman
5
Views
4,832

### There is a homework section for homework help....

There is a homework section for homework help. Key word being 'help'.

The point is for you to learn, not to copy some answer you get off the internet.
39. ## Question: Writing equations in a Linear Rule

by iamthetman
1
Views
2,951

y=4x-3
40. ## Question: Probability and statictics

by iamthetman
4
Views
613

### If a lottery ticket gives 1:99 odds, what is the...

If a lottery ticket gives 1:99 odds, what is the probability of drawing two winning tickets

Well the probability of drawing one winning ticket is 1/100 so the probability of drawing two would be...
41. ## Question: 3rd grade math

by iamthetman
6
Views
1,538

8+1+3=14
1+3+8=14
3+8+1=14

8+(1+3)=14
(8+1)+3=14
1+(3+8)=14
(1+3)+8=14
3+(8+1)=14
(3+8)+1=14
42. ## Question: Linear function

by iamthetman
1
Views
835

### I believe there are many possible solutions to...

I believe there are many possible solutions to this.

One possible solution would be f(x) = x + 13 * (100-x)/38 although lower orignal scores like 20% change more drasticaly than higher original...
43. ## Question: Find Dimension of a pack of paper

by iamthetman
2
Views
1,113

### Actually, if you take a piece of paper and double...

Actually, if you take a piece of paper and double the length and height of the paper, you get a sheet of paper that is 4 times the size. This would mean that the full pack weighs 40 lbs.
44. ## Question: Story suit ?

by iamthetman
1
Views
915

### Well if he sold 4/5 of them, he has to have 1/5...

Well if he sold 4/5 of them, he has to have 1/5 left right...

So what's 1/5 x 225
45. ## Question: Story ?

by iamthetman
1
Views
861

### What's four-fifths of the 45 gallons that you...

What's four-fifths of the 45 gallons that you have?
46. ## Question: Combination and Permutation

by iamthetman
1
Views
1,150

### Let's look at just the ways of selecting 3...

Let's look at just the ways of selecting 3 jacks...

Jack of Hearts, Jack of Spades, Jack of Diamonds
Jack of Hearts, Jack of Spades, Jack of Clubs
Jack of Hearts, Jack of Diamonds, Jack of...
47. ## Question: The drunkin stranger.

by iamthetman
6
Views
877

Nice!
48. ## Question: Probability and statictics

by iamthetman
4
Views
613

### Binomial Distribution -- from Wolfram MathWorld...

Binomial Distribution -- from Wolfram MathWorld
49. ## Question: Balancing equations

by iamthetman
5
Views
4,832

### That would be my guess at the second one. 2K +...

That would be my guess at the second one.

2K + 2H2O -> 2kOH + H2

Please note that we don't do homework for you on this site.
50. ## Question: Balancing equations

by iamthetman
1
Views
855

### Haven't done this in a while but I think the...

Haven't done this in a while but I think the first one is:
N2 + 3H2 -> 2NH3

Second one is probably:
2KClO3 -> 2KCl + 3O2

Third is probably:
2NaCl + 2F -> 2NaF + Cl2

Fourth is probably:
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