I suck at math!!!!

10-11-06, 10:33 PM

God I hate algebra!!!

Anyone know how to do this stuff? It's been like 10+ years since I've seen this stuff!

Evaluate and Simplify the problem

x2y – 3x – y when x = -1 and y = 1

10-11-06, 10:34 PM

Also, does anyone know of any good math websites where you can enter problems like these and get the answers and where it shows you how it solved the problem?

Kapitan · 10-12-06, 12:31 AM

www.bbc.co.uk/bitesize

lesrae · 10-12-06, 12:35 AM

Substitute in the values and then do the sum:

x2y – 3x – y when x = -1 and y = 1

= (-1 * 2 * 1) - (3*-1) -1

= -2 - (-3) -1

= -2 + 3 -1

= 0

(I think)

goldorak · 10-12-06, 01:27 AM

Quote:

Originally Posted by lesrae

Substitute in the values and then do the sum:

x2y – 3x – y when x = -1 and y = 1

= (-1 * 2 * 1) - (3*-1) -1

= -2 - (-3) -1

= -2 + 3 -1

= 0

(I think)

Strange, by convention numerical factors are always written before the variables so x2y should really be written 2xy.
Otherwise it could be interpreted as x^2*y.

The Noob · 10-12-06, 03:26 AM

@SubSerpent

I suck at math too. Badly. :p

STEED · 10-12-06, 05:38 AM

What do you think calculators are for?

jumpy · 10-12-06, 06:07 AM

hehe, maths? I had to take my GCSE twice - grade E 1st time, grade D second time.
Was always better at languages.

Now I have an impressive CAD program to work out all of my sums etc for drawing work. Who needs a pen and paper anymore?

Now I do something a little in line with algebra (in as much as it has alkward syntax and rules etc) but completely different:

Code:

;;; DRAWING / PLOT SETUP ROUTINE FOR ******** DRAWINGS 1:100 @A0
;;; SETS LIMITS AND LOCKED VPORT IN PSPACE WITH CORRECT PLOTTING
;;; SETTINGS BEFORE PROMPTING USER TO SAVEAS.
;;; CREATED BY **** **** : 10/10/06.


(DEFUN C:A0-100    ()
  ;; SWITCH TO M/SPACE
  (COMMAND "TILEMODE" "1")
  (COMMAND "ZOOM" "E")

  ;; SWITCH TO P/SPACE
  (COMMAND "TILEMODE" "0")

  ;; P/SPACE SETTINGS
  (COMMAND "LIMITS" "0,0" "1189,841")
  (COMMAND "GRID" "ON")
  (COMMAND "ZOOM" "E")
  (COMMAND "LAYER" "MAKE" "_VPORT" "")
  (COMMAND "VPORTS" "0,0" "1189,841")
  (COMMAND ".MSPACE" "ZOOM" "E")
  (COMMAND "ZOOM" "1/100XP" ".PSPACE")
  (COMMAND "REGENALL")

  ;;PLOT SETTINGS
  (COMMAND "-PLOT"     "Y"           "LAYOUT1"
       "\\\\ukleifile02\\HPCL30"   "OVERSIZE: ISO A0"
       "MILLIMETERS" "LANDSCAPE"   "NO"         "EXTENTS"
       "1:1"     "CENTER"      "NO"         "."
       "NO"         "NO"           "YES"         "NO"
       "NO"         "YES"           "NO"
      )

  ;; LOCK VPORT
  (COMMAND "VPORTS" "LOCK" "ON" "ALL" "")
  (COMMAND "ZOOM" "E")
  (COMMAND "LAYER" "SET" "0" "FREEZE" "_VPORT" "LOCK" "_VPORT" "")
  (COMMAND "REGENALL")

  ;; FINAL
  (INITDIA)
  (COMMAND "SAVEAS")

  (PRINC)

)

;; END DEFUN

It's fairly basic for CAD programing, but I'm getting there oh so slowly

if you don't hear from me it's because I'm 'Lost In Stupid Parentheses'

ASWnut101 · 10-12-06, 02:20 PM

Yes, its defenatly 0, no doubt about it.

10-11-06, 10:33 PM	#1
SubSerpent Stowaway Posts: n/a Downloads: Uploads:	I suck at math!!!! God I hate algebra!!! Anyone know how to do this stuff? It's been like 10+ years since I've seen this stuff! Evaluate and Simplify the problem x2y – 3x – y when x = -1 and y = 1 Last edited by SubSerpent; 10-11-06 at 11:06 PM.

10-11-06, 10:34 PM	#2
SubSerpent Stowaway Posts: n/a Downloads: Uploads:	Also, does anyone know of any good math websites where you can enter problems like these and get the answers and where it shows you how it solved the problem? Last edited by SubSerpent; 10-11-06 at 11:09 PM.

10-12-06, 12:31 AM	#3
Kapitan Sub Test Pilot Join Date: Mar 2005 Location: UK + Canada Posts: 7,130 Downloads: 77 Uploads: 7	www.bbc.co.uk/bitesize __________________ DONT FORGET if you like a post to nominate it by using the blue diamond Find out about Museum Ships here: https://www.museumships.us/ Flickr for all my pictures: https://www.flickr.com/photos/131313936@N03/ Navy general board articles: https://www.navygeneralboard.com/author/aegis/

10-12-06, 12:35 AM	#4
lesrae Grey Wolf Join Date: Feb 2004 Location: Somerset, UK. Posts: 932 Downloads: 31 Uploads: 0	Substitute in the values and then do the sum: x2y – 3x – y when x = -1 and y = 1 = (-1 * 2 * 1) - (3*-1) -1 = -2 - (-3) -1 = -2 + 3 -1 = 0 (I think) __________________ DOLPHIN 38

10-12-06, 05:38 AM	#7
STEED Lucky Jack Join Date: Jan 2006 Location: Down Town UK Posts: 27,695 Downloads: 89 Uploads: 48	What do you think calculators are for? __________________ Dr Who rest in peace 1963-2017. To borrow Davros saying...I NAME YOU CHIBNALL THE DESTROYER OF DR WHO YOU KILLED IT!

10-12-06, 03:26 AM	#6
The Noob The Old Man Join Date: Sep 2005 Location: de_dust2 Posts: 1,417 Downloads: 0 Uploads: 0	@SubSerpent I suck at math too. Badly. :p

10-12-06, 02:20 PM	#9
ASWnut101 Admiral Join Date: Sep 2006 Location: USA Posts: 2,021 Downloads: 9 Uploads: 0	Yes, its defenatly 0, no doubt about it. __________________

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