Math problem

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Easy to verify. Put 4 instead of x in the equation. You get 2*4+4?=0. Obviously 2*4+4=3*4=12, and 12 is not equal to zero. The value x=4 is not a solution of the equation.**2x+4=0, gives 2x=-4 and x=-4/2=-2**

Posted on Feb 09, 2012

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Posted on Jan 02, 2017

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I think the problem with this equation comes when x = 0. At this point, it is undefined. Thus, it is a horizontal line y=-2, except when x=0. This is normally signified by putting an open circle when x=0.

I hope I answered you question. If not, repost.

Good luck,

Paul

I hope I answered you question. If not, repost.

Good luck,

Paul

Sep 09, 2016 | Casio FX-82MS Scientific Calculator

Apr 07, 2013 | Casio FX-115ES Scientific Calculator

hi.

i am assuming this is to do with programming the machine or a maths question in the wrong section.

fortunately i was always good at maths.

the graph shown will be a straight line.

x2 and 2x are the same thing. so x2-2x will always = 0. square root of 0 is 0

y will always = 0 no matter what x is.

hope this helps

i am assuming this is to do with programming the machine or a maths question in the wrong section.

fortunately i was always good at maths.

the graph shown will be a straight line.

x2 and 2x are the same thing. so x2-2x will always = 0. square root of 0 is 0

y will always = 0 no matter what x is.

hope this helps

Jun 29, 2011 | Sewing Machines

2x + 4y = -8 ; divide each side by 2

x + 2y = -4 ; subtract x from both sides

2y = -4 - x ; rearrange

2y = -1x -4 ; divide each side by 2

y = -1/2x - 2 ; relate to slope/intercept form of line (y=mx+b)

implies there are multiple solutions that fall along a line with slope -1/2 and y intercept of -2

'

\ '

++++++++++

\ '

\ '

Sample points on this line are (-4,0), (-2,-1), (0,-2), (2,-3)

x + 2y = -4 ; subtract x from both sides

2y = -4 - x ; rearrange

2y = -1x -4 ; divide each side by 2

y = -1/2x - 2 ; relate to slope/intercept form of line (y=mx+b)

implies there are multiple solutions that fall along a line with slope -1/2 and y intercept of -2

'

\ '

++++++++++

\ '

\ '

Sample points on this line are (-4,0), (-2,-1), (0,-2), (2,-3)

Nov 04, 2010 | Mathsoft StudyWorks! Mathematics Deluxe...

Graph 2X PLUS 1 for X in open interval ]-1,0[

It should be entered as follows

(2X plus 1) (X larger than negative 1) (X less than zero)

In [Y=] editor and on line Y1= type your right hand side between parentheses (2X Plus 1). I use the Plus instead of the usual sign because the parser of the web site removes the sign.

[( ]2 [X,T,theta,n] [Plus] 1 [)] [(] [X,T,theta,n] [2nd][MATH] [3: larger than] [(-)] 1 [)] [(] [X,T,Theta,n] [2nd][MATH][5: less than] 0 [)]

Here are some screen captures to help you

It should be entered as follows

(2X plus 1) (X larger than negative 1) (X less than zero)

In [Y=] editor and on line Y1= type your right hand side between parentheses (2X Plus 1). I use the Plus instead of the usual sign because the parser of the web site removes the sign.

[( ]2 [X,T,theta,n] [Plus] 1 [)] [(] [X,T,theta,n] [2nd][MATH] [3: larger than] [(-)] 1 [)] [(] [X,T,Theta,n] [2nd][MATH][5: less than] 0 [)]

Here are some screen captures to help you

Oct 30, 2010 | Texas Instruments TI-84 Plus Calculator

Let the three consecutive numbers be x, x+1, x+2.

Now, the smallest is 57 less than three times the largest...

=> x + 57 = 3(x + 2)

=> x + 57 = 3x + 6

=> 2x = 57 - 6

=> 2x = 51

=>** x = 25.5**

=> x, x+1, x+2 = 25.5, 26.5, 27.5

So, the three consecutive numbers are**25.5, 26.5, 27.5**.

Now, the smallest is 57 less than three times the largest...

=> x + 57 = 3(x + 2)

=> x + 57 = 3x + 6

=> 2x = 57 - 6

=> 2x = 51

=>

=> x, x+1, x+2 = 25.5, 26.5, 27.5

So, the three consecutive numbers are

May 11, 2009 | The Learning Company Achieve! Math &...

See this solution http://www.fixya.com/support/t663157-calculate_equation,

also in the case of your example:

4y=2x4 (4 times y = 2 times x times 4, moving the 4 over makes it divide by 4)

y=__2x4__ (the 4's cancel out, 4 divided by 4 = 1, 1 times anything is the same)

4

so y=2x (if we move x over it becomes divide by)

so__y__=2 (y diveided by x = 2 is as far as you can go)

x

also in the case of your example:

4y=2x4 (4 times y = 2 times x times 4, moving the 4 over makes it divide by 4)

y=

4

so y=2x (if we move x over it becomes divide by)

so

x

Jun 26, 2008 | Casio FX-300MS Calculator

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