Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

You are not logged in.

## #76 2013-09-19 23:07:56

Derick Mixon
Full Member

Offline

### Re: Math

Can you show me how you would solve this? I have the answers is you want to see them

Uploaded Images

## #77 2013-09-20 00:39:40

bobbym
Administrator

Online

### Re: Math

Start by doing the subtraction on the left side.

Now cross multiply.

Factor,

You have x = 0 and x = -2. We reject the 0 solution so x = -2.

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

Derick Mixon
Full Member

Offline

1/2 right?

## #79 2013-09-20 01:58:16

bobbym
Administrator

Online

### Re: Math

For the first one?

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

Derick Mixon
Full Member

Offline

yes

## #81 2013-09-20 02:00:42

bobbym
Administrator

Online

### Re: Math

In post #77 I solved it already, the answer is -2.

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

## #82 2013-09-20 02:03:12

Derick Mixon
Full Member

Offline

### Re: Math

ok youre right I see It now what abou the next one

Last edited by Derick Mixon (2013-09-20 02:04:48)

## #83 2013-09-20 02:04:54

bobbym
Administrator

Online

### Re: Math

Give me some time to do the other ones. I will post them right here.

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

Derick Mixon
Full Member

Offline

ok thanks

## #85 2013-09-20 02:40:41

bobbym
Administrator

Online

### Re: Math

Multiply both sides by 20.

Clean it up.

Add 8 to both sides.

Subtract 5x from both sides.

Divide both sides by 15 and you get x = - ( 17 / 15).

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

## #86 2013-09-20 03:17:10

Derick Mixon
Full Member

Offline

### Re: Math

I have that as well. ok the next question

## #87 2013-09-20 07:45:36

bobbym
Administrator

Online

### Re: Math

Times both sides by 24.

Add 9 to both sides.

Subtract 8x from both sides.

x = 1

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

## #88 2013-09-20 09:51:36

Derick Mixon
Full Member

Offline

### Re: Math

are you done for the night?

## #89 2013-09-20 12:20:39

bobbym
Administrator

Online

### Re: Math

Hi;

Yes, I am going to eat.

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

## #90 2013-09-20 22:37:08

Derick Mixon
Full Member

Offline

### Re: Math

Did you do the rest yet?

## #91 2013-09-20 22:40:34

bobbym
Administrator

Online

### Re: Math

Take 1 / 9 away from both sides.

Flip them both,

x = 3

For the last one:

Times both sides by 15x.

Divide both sides 4.

x = ( 14 / 4 ) = ( 7 / 2 )

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

## #92 2013-09-22 03:17:02

Derick Mixon
Full Member

Offline

### Re: Math

Are you in today?

## #93 2013-09-22 03:19:51

bobbym
Administrator

Online

### Re: Math

Yes, I am.

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

## #94 2013-09-22 03:45:47

Derick Mixon
Full Member

Offline

### Re: Math

State the domain of y = x2

State the range of y = x2

State the domain of y = x2 + 2

State the range of y = x2  + 2

State the domain of y = 2x2 + 3

State the range of y = 2x2 + 3

State the domain of y = x2 – 5

State the range of y = x2  - 5

State the domain of y = -x2

State the range of y = –x2

## #95 2013-09-22 03:54:31

Derick Mixon
Full Member

Offline

### Re: Math

Can you show me how to solve them?

## #96 2013-09-22 03:57:29

bobbym
Administrator

Online

### Re: Math

What is x2?

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

Derick Mixon
Full Member

Offline

The x value

## #98 2013-09-22 04:28:58

bobbym
Administrator

Online

### Re: Math

And the 2, is that a power?

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

Derick Mixon
Full Member

Offline

yes

## #100 2013-09-24 06:26:49

bobbym
Administrator

Online

### Re: Math

State the domain of y = x^2

State the range of y = x^2

I get the domain as R and the range as [0,∞)

State the domain of y = x^2 + 2

State the range of y = x^2  + 2

Domain is R and the range is all positive reals greater than or equal to 2.

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

## Board footer

Powered by FluxBB