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P8+*צThis problem is not finished.+*+*+*V [é"Ä**é"Ý  X^^`: plify factor ˡ:  Here is how we צ Please " Here is the solution.תP"é" R "   eiw& ũ"  n ȡ5ؚ$% aam  nɫ ٩n   nn 2 ,2:when ɡצsimplify factor ˡ:  Here is how we צ Please " Here is the solution.תP"é" R "   eiw& Qۢj*á  9 ګr| Qj   á $á @dĄ  QjQj%ũ  s      ,06 ^      Hr&F,xr š=  9$R^ײؕצ#With my help, you are going to type~~~~jצצat the keyboard. ^ײšצ^צ*However, you are going to make a mistake,  ˡ 2[3] צe=mc[2] צc[2]=a[2]+b[2] ?ˡ!~~~~~ means "power starts here"and!~~~~~ means "back to baseline."<DJll in either the second box or the first box.تP  %ۡ.צ[CTRL] PP.[CTRL] BתP)ۡ. [up-arrow]תP.צ [down-arrow]P.Pvצ&Type to begin an exponent or "power".צAt the end of the exponent, !type to go back to the baseline.P-á(ײP) צ0*P = 0. TS 2צ'As you see, there is a difficulty here.U צSince 0 times any number is 0, צ1there is no way to fill in either the second box or the first box.Thus, the expression   צ)is meaningless; we say it is "undefined".Vf*צ3*2=6P* *צ{6|0}P* 6B8z צTS@{ΗhצNo, P-á(ײP) צ0*P = 0. TS 2צ'As you see, there is a difficulty here.U צSince 0 times any number is 0, צ1there is no way to fill in either the second box or the first box.   צ =צ means  TSTS  U U ,What number could be used in the second box?$(Type a question mark if necessary.)צTS@{ΗhצNo, e saw that     צ because >  .  Similarly, <      ,  צ0*צ= 6 .4 تPPR* +-+-ȡ* ~~~~~צ{ |0}P1+4+     = ,  P  +á'צLet's try another example.-%Remember, [CTRL] U means "undefined".++Z  W צ{6|3}=2P R">In fact, any number divided by 0 produces an undefined result.צ(To say that an expression is undefined, צByou hold down the key marked [CTRL] or [CONTROL] while typing "U".*Division is the reverse of multiplication.צ For example, 6 divided by 3 is 2צbecause 3*2 = 6.9There are many correct methods for doing these problems, צ.and there may be more than one correct answer.;Look for sh you type the letter X, צyour entire answer is erased.!Then you can re-type your answer.3Sometimes it is easier to erase your entire answer צ5with [CTRL] X than to use [left-arrow] over and over. ˡצ 1*2=4^2*2=4צx[2]+^ax[2]+bx+c=0P RD   \TF6 צby pressing [left-arrow].+However, another way is by using [CTRL] X. 4If you hold down the key marked [CTRL] or [CONTROL] while you type the letter X, צyour entire answer is erased.!Then you can re-type your answer.3Sometimes it is easier to erase your entire answer צ5with [CTRL] X than to use [left-arrow] over and over. ˡ #! $!!!"!%!"!#!&!$!#! )Please simplify the following expression:צ !+"-#dšJWe want a hint. Type G, or press arrow keys until "Get a hint" is lighted.צ "Get a hint." צ(Add or subtract. (This is your hint.) צ"Type either $-# or !+% or & .$-#צ!+%& ᓡ Type & .&צ @Type F, or press arrow keys until "Finished problem" is lighted.צ"Finished pro& ܟˡ,  צSYSTEM FAILURE NUMBER  צ. PLEASE REFER "TO PRODUCT MANUAL FOR EXPLANATION.  DFCOPYRIGHT 1979,1980,1983-1985 APPLE COMPUTER, INC. ALL RIGHTS RESERVED    DPASCALSYUSERPROGFIOPRIMSPRINTERRINITIALIGETCMD SYSIO d, stored in a retrieval"system except as an essential step'in its execution, or transcribed in anyBrooks/Cole Publishing Co. 555 AbregoMonterey, CA, 93940, Student diskLicensed for use only at%Please respect the license agreement. Published by BrnP6 V >DPژZ   O ?"¨n6 r P  ^  All rights reserved.No part of this program may be!reproduce $: T7^dH|thRz Dh(the expression /?Í1 >  ٫ث", $. צ System error.Hold [CTRL] and press [RESET]. n   B پ á2 BQآjآjآjآj0P0آjآj0//'?ˡצPlease try again.~ܪPNow type the expression /?Í1 >  ٫ث****-*******+++,*,-*----------**+++-n ݪP ء000 ءQ  ق  ق T ^۪PHere is how you type 3R@ ġ*پ áپ á צ That's right.*Q   ȡZپ[á   3]á   {á|á}áڿb r  Q  O@**-*-*-*-****-+*+****-**-***!Would you like to try that again  @   צIt's easy to remember that 0צLet's try it now."ئ*When the cursor returns, please try again.תP8 ?ˡצ"[CTRL] N means "begin Numerator",צ$[CTRL] D means "begin Denominator",צand9[CTRL] B means "Back to Baseline" (end the denominator). šJWe want a hint. Type G, or press arrow keys until "Get a 9To type a fraction, type [CTRL] N to start the numerator.'Type [CTRL] D to start the denominator.+Type [CTRL] B to go back to the base level.  צ {4|10}={2|5} {x[2]+1|x[2]-1} {1|u+1}-{1|u}blem." &Correct. 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You have completedall the lessons iצStart DENOMINATOR9צ[CTRL] BEnd denom. (go to BASELINE)׮9v; á Review Beginn ing lesson  .š TYPING REMINDERS[ESC] צSEE TYPING REMINDERS9? צ ASK FOR HELP9ǕɡCצ[o multiply)9[CTRL] FצFinished (no more steps)9 [up-arrow]תPb צ[CTRL] PPBegin Power (exponent)׮9צ [down-arrow]Pb [CTRL] BתPצEnd power (go to Baseline)9R:צ[CTRL] NStart NUMERATOR׮9[CTRL] D[ESC] for typing instructions,' and again to return to your problem. 7צ$For example, please press [ESC] now.& 6,٪PتP,צ . . . . . .U ,U:9צ[CTRL] XErase your answer׮9* צType a dot (t%You can skip many steps in the longer problems with a little practice.5,Ï7 צ IMPORTANT REMINDERSצ When solving a problem, you may:7!1. type a question mark for help,7'2. press !ʃ5ʃ52aƁ5a5" á,Ab j+2;ؕ !There are many correct ways to docomplicated problems.I'll accept any correct steps.צAlways look for shortcuts.!aƁ5a5adkl̃5ʃ5̃6ʃ6P̃7ʃ5bܓ ʃ6cš3ʃ6bʃ6bޡ1- ʃ7Ś4ʃ6eʃ7ʃ6dʃ6bX ʃ5!ɄY ʃ5ʃ5!ons.צYou will begin with lesson."During a lesson, when the flashingצ!cursor is visible, you can changeצ%to a different lesson by holding downצ%the [CTRL] key and typing "Z" and "/"צin rapid succession.$4쥁b ȄÍ P2lۢPȍFڣ2ˡ2ٚܢá%ܢܢ ܢܢܢ f1lȡ٢Uؤ٢U٣c٢c-B3ˡSצ'You are scheduled to skip some lessselect a different lesson.lesson titles.(צ For lesson, just press [RETURN].LESSON ( toצ) ? "  10ġɡ ݂0š  áښݓa fƁƁ"šʁʁōʁʁP܍ʁÍʁʁ ŴʁʁȄʁʁƁ!.ܓf - צYou'll now do lesson number,צ%unless you ous record of thisstudent (Y or N) ?"ڳ@@NnÍ- 0ۡ l/ܶ ލ0ݍݡ,ۡ lצX, ad kݓlcz..ĺʁṔ)adɩl"ák!* 2,lڢP ZY٢٢٢š٢ ٢Ŷō< v/lۢׯThis disk belonged toۢ'May I erase the previice problems on this material.ǰ b'SYSTEM.STARTUP.תPa'צPlease return your disksצto your instructor or tutor.  To run another program,insert the appropriate disk.pV Fn this portionof the course.áY&However, this demonstration version isצ'much shorter than the complete version.adYour next lesson will be*Then you'll return to*!˥bDinstruction and(#practRETURN]End your answer9[SHIFT] צType an upper symbol9 [left-arrow]צErase a character9,ġ [CTRL] UצType "Undefined"9;ġ:Ǖġ;&צOne moment, please. $|8š;SOLVEׯ;SIMPMׯ넡5ń68a ;'쥁b ;;;bتPRتPR צ .۪P٪P. ء&m K"form or b$PROCEDURE WSTRING(S: STRING); $PROCEDURE CHARTYPE(MODE: INTEGER); "IMPLEMENTATION X E )4#i JL` T$Q%P)Q I L`#JI`'  I` I0ݩ(0/,",i8i#Hiihifi`i,i,3iPII4ifH8H hIiH CREENBIT(X,Y: INTEGER): BOOLEAN; $PROCEDURE DRAWBLOCK(VAR SOURCE; ROWSIZE,XSKIP,YSKIP,WIDTH,HEIGHT, 8XSCREEN,YSCREEN,MODE: INTEGER); $PROCEDURE WCHAR(CH: CHAR); ` 8`*UH)JJh & & fDURE PENCOLOR(PENMODE: SCREENCOLOR); $PROCEDURE TEXTMODE; $PROCEDURE GRAFMODE; $PROCEDURE FILLSCREEN(FILLCOLOR: SCREENCOLOR); $PROCEDURE VIEWPORT(LEFT,RIGHT,BOTTOM,TOP: INTEGER); $FUNCTION TURTLEX: INTEGER; $FUNCTION TURTLEY: INTEGER; $FUNCTION S $TYPE $ SCREENCOLOR=(none,white,black,reverse,radar, 3black1,green,violet,white1,black2,orange,blue,white2); & &FONT=PACKED ARRAY[0..127,0..7] OF 0..255; & $VAR &FONTPTR:^FONT; $ $PROCEDURE INITTURTLE; $PROCEDURE MOVETO(X,Y: INTEGER); $PROCEتPDŽE  RDŽE ٪P E   (   >6Vz.@~CODE.CODEACKE.CODE1.TEXTG[:mƳgEʷ  تP,,PT  @ \ ܡ@ ܡڡ݂P تPǜE  RCL<<ʷZ\\ʷxR` [E :E BODY3 WRITELINUNITPARTCOMPOPTINUMSTRIN\\ER.CODE1\.TEXTGb[h:mng>ʷB `^ph.CODE.CODEACKE.CODE1.TEXTG[:mƳgEʷ "PROCEDURE SETCHAIN(TYTLE:STRING); "PROCEDURE SETCVAL(VAL:STRING); "PROCEDURE GETCVAL(VAR VAL:STRING); "PROCEDURE SWAPON; "PROCEDURE SWAPOFF; "PROCEDURE SWAPGPON;  IMPLEMENTATION E 2L 8<=>F?A:CGJJLʷ"L(E(c)1987 by John C. Miller; 1983,1985 by Apple Computer; 1979 by UCSD.D < #',1=R DJJN CHAINSTUSHORTGRASHORTGRAGRAFA GRAFA GRAFC CONIO SHOBL STRAP EXMAK ALGIO EVALU AXDRW LINXT TABGR  "%+0;CIMm!J,VfrpP z , n Z`$<F.&T,z$p6Xl0 X8v;adsworth, Inc.ת(צBelmont, California 94002.(צa division of Wadsworth, Inc.(%Pascal Runtime System (C) 1979, 1980,ת(צ%1983 and 1985 by Apple Computer, Inc.("Portions of this software (C) 1979ת(yצby University of California.(dTelephone: 4O8-373-O728ת(  ;+ b)y any means -- electronicת(6#mechanical, photocopying, recordingת(!צ!or otherwise -- without the prior( $written permission of the publisher,ת((C) 1986 by Wadsworth, Inc.ת(צBelmont, California 94002.(צa division of Wadsworth, Q%P)Q I L`#JI`'  I` I0ݩ(0/,",i8i#Hiihifi`i,i,3iPII4ifH8H hIiH ǯ?Ǭ?ǰ?Ǯ?ǩ? áǫ?Ǭ?0 ٢ؚ ڢؚڢٚ ۚܢښܢٚܢؚɡšܢɡܢǿšܢǿɡܢɡܢ  USES {$U A.LIB}SHORTGRA; CONST "XC=6;YC=10;YCHMAT=8;CHSPACE=2;YRV=184;YMAX=191;XMAX=279; "INFINITY=1E36;ASCMAX=127;BKMAX=15;PLACEMAX=79;LEVELMAX=8;ECON0=64;ECONMAX=95; "VARMAX=7;ALPHAMN=97;ALPHAMX=122;ROWMAX=24;STEPMAX=4;COLMAX=2; "CTRLB=2;CTRLD=4;FTURTLEY 8 SCREENBI5 X 0505Y DRAWBLOCT96l5  SOURCE 555 LROWSIZE 55XSKIP 555YSKIP 65QH?\H ` h  (j` , ~  ( FILLCOLOp:t1VIEWPORT4P4LEFT f4|4f4RIGHT 4|4BOTTOM 4TOP TURTLEX 4 *)fjfjfj+*fjfjfj8 8)eeL )` (J(F ((Lee L  )L6I1L6)QL6        zjZ )# " `' & 8 ! 0%ee8` !  e e8"#088$ % 0%ee8`$ %  e e8&'08e*e+) [B  ""##8&$iT8&UU ! U"# UT`+%$Y)!p JhhhhhhhhhhH8 )%HHH`5>hhh)hh h h h hhhhhhhhhhhhHH J "  ` ` `SN-(' . hhhhhhHH `  [HH8H8 hhhL.+ rhh heheheheHHLh< L)ˢ   â LE % %  )  `8`&e epɀj f f&e e pɀjff %) % )`% L=`0(%$ $ @' &    0&!"   #eNEDh0h1hhhhh.h/h,h-h*h+h(h)(ȱ(*ȱ*,ȱ,.ȱ. HH1H0H(ȹ(*ȹ*,ȹ,.ȹ.`   ""##  )`%)8`)     e e  `(J 8 e  ` Z Z< $ %$PQ $  ߩ $ Li`t^cY}z I L`#JI`'  I` I0ݩ(0/,",i8i#Hiihifi`i,i,3iPII4ifH8H hIiH h hL8Iif E J j 8TEM.CHARSETx @4` - G`` 8`*UH)JJh & & f)4#i JL` T$Q%P)QتP+,+,ȡ+ ++V 0  آآآǿآآǿآآ@ ǻٚ SYSTEM.CHARSETáSYSl    ڪP."ˡ[̄$ʄ$N.ʄ$M ń.ʄ$M  ʄ$̄$.ʄ$M .ʄ$M Y@'    4 INI=6;BEEP=7;BKSP=8;CRET=13;CTRLN=14;CTRLP=16;CTRLR=18; "UNDEF=21;LABS=22;RABS=23;CTRLX=24;LPAR=40;RPAR=41;ASTK=42;PLUS=43;MINUS=45; "DECPT=46;SLASH=47;ASC0=48;LTHAN=60;EQUAL=61;GTHAN=62;QMARK=63; "DRAW=10;ERASE=0;AXORS=6;LEAVE=12; "SHFSIZE=12;MAXTERM=33; "UNDEFST='Undef.';FINISHED='Finished';  TYPE "intPtr=^integer; "cvalBlks=RECORD -codBlk,qusBlk,msgBlk,proBlk,nesBlk,lesBlk,dusBlk,ustBlk:integer +END; "cvaldata=PACKED RECORD -dummyLength:integer; -curVol,tstVol,dusVol,startVol:0..15; -bit12, & ب     (ܪP/0/0ȡ Ǹؕ/ //*V H؏ ١ ڢ؏ڢٍDުP_MAX:INTEGER):INTEGER; PROCEDURE GETMSG(VAR ST:STRING;M:MSGTYPE;MSGNUM:BYTE); PROCEDURE INFRAME(LEFT,RIGHT,TOP,BOT:INTEGER); PROCEDURE OUTFRAME; PROCEDURE CLEAR(X,Y:INTEGER;L:BYTE); PROCEDURE BOTTOM(VAR X,Y:INTEGER;L:BYTE); PROCEDURE CLRBOT(L:BYTE); PROCEDURE MSGBOT(M:STRING;L:BYTE);  IMPLEMENTATION E DURE BAR(X0,Y0,X1,Y1:INTEGER;C:SCREENCOLOR);  PROCEDURE ADDCHAR(VAR S:STRING;A:BYTE); PROCEDURE GETSTR(VAR S:STRING;A:BYTE); PROCEDURE DISPLAY(A:BYTE;M:MODE;VAR X:INTEGER;Y:INTEGER); FUNCTION RAND(MIN,MAX:INTEGER):INTEGER; PROCEDURE GETMSG(VAR ST:STRING;M:MSGTYPE;MSGNUM:BYTE); PROCEDURE INFRAME(LEFT,RIGHT,TOP,BOT:INTEGER); PROCEDURE OUTFRAME; PROCEDURE CLEAR(X,Y:INTEGER;L:BYTE); PROCEDURE BOTTOM(VAR X,Y:INTEGER;L:BYTE); PROCEDURE CLRBOT(L:BYTE); PROCEDU-Y,CS:INTEGER;CLRKBD:BOOLEAN;M1,M2,MLAST:MODE); PROCEDURE BAR(X0,Y0,X1,Y1:INTEGER;C:SCREENCOLOR);  PROCEDURE ADDCHAR(VAR S:STRING;A:BYTE); PROCEDURE GETSTR(VAR S:STRING;A:BYTE); PROCEDURE DISPLAY(A:BYTE;M:MODE;VAR X:INTEGER;Y:INTEGER); FUNCTION RAND(MIN,valdata);  PROCEDURE PAUSE(CS:INTEGER); PROCEDURE WSTR(S:STRING;M:MODE;VAR XP,X:INTEGER;Y:INTEGER); PROCEDURE FLSHRD(ST:STRING;M1,M2:MODE;VAR XP,X:INTEGER;Y,CS:INTEGER); PROCEDURE GETCH(VAR CH:CHAR;ST:STRING;VAR CT,XP,X:INTEGER; "ZMAT:^ZARRAY; "TERMS:^TERMARRAY; "NVAR:VARPOS0; "SEED,XSCR,YSCR:INTEGER; "K128:BOOLEAN; "cvaldatPtr:^cvaldata; "SCP:^SCRNPAR; "FRAMES:^FRAMESET; "NUMV:NUMVAR; "FR:FRAME;  FUNCTION KEYPRESS:BOOLEAN;  PROCEDURE CLEARKBD;  PROCEDURE MSGINIT(cv:cPWRARRAY; $TCOEFF:REAL "END; "TERMNUM=0..MAXTERM; "TERMARRAY=ARRAY[TERMNUM] OF TERMRECORD; "SOURCE=(PROGINV,PROGVIS,USERVIS,DICTATE); "VETO=(NOVARS,NOOPS,NODEC,NONEG); "VETOSET=SET OF VETO;  VAR VARS,DIGITS:^ASCIISET; "LEV:LEVEL; "EXPL:^EXPLIST; $XB,YB,XBEG:ARRAY[DVCOL] OF INTEGER; $YBEG:INTEGER; $GRFR:FRAME; $AXASC,PXBL:PACKED ARRAY[1..2] OF BYTE; $BLX:ARRAY[1..2] OF REAL; "END; "MSGTYPE=(MSGDUM,ERR,TAB,SIMP,SOLV,MISC); "PWRARRAY=PACKED ARRAY[ALPHAVAR] OF BYTE; "TERMRECORD=RECORD $TPWR:ESET=ARRAY[LEVEL] OF FRAME; "VARPOS=1..VARMAX; "VARPOS0=0..VARMAX; "ZROW=ARRAY[VARPOS] OF REAL; "ROW=0..ROWMAX; "ZARRAY=ARRAY[ROW] OF ZROW; "ALPHAVAR=ALPHAMN..ALPHAMX; "NUMVAR=PACKED ARRAY[ALPHAVAR] OF VARPOS0; "DVCOL=1..COLMAX; "SCRNPAR=RECORD OF PLACE; $BNM,BA:PACKED ARRAY[BLOC] OF BLOC; $BK:PACKED ARRAY[PLACE] OF BLOC; $RBLOCK:BLOC; $RPLACE:PLACE; $BTOT:INTEGER "END; "STEP=1..STEPMAX; "EXPLIST=ARRAY[STEP] OF EXPR; "FRAME=PACKED ARRAY[1..2,0..2] OF INTEGER; "LEVEL=0..LEVELMAX; "FRAMY[ECONPLACE] OF REAL; "EVALUATOR=RECORD $EOPS:STRING; $ECONPTR:ECONPLACE; $ECON:ECONARRAY "END; "EXPR=PACKED RECORD $EV:EVALUATOR; $EXPRST:STRING; $XMP:ARRAY[PLACE] OF INTEGER; $YMP:PACKED ARRAY[0..3,BLOC] OF INTEGER; $BB:PACKED ARRAY[BLOC,0..1].false:(cvalstr:string); .true :(cvaldat:cvaldata) ,END; "SHFARRAY=ARRAY[0..SHFSIZE] OF INTEGER; "MODE=0..15; "BYTE=0..255; "ASCII=0..ASCMAX; "ASCIISET=SET OF ASCII; "BLOC=0..BKMAX; "PLACE=0..PLACEMAX; "ECONPLACE=ECON0..ECONMAX; "ECONARRAY=ARRAbit11,disk35,twoPlus,normalExit,myDemo,ssDisk,init, /stayGraf,dumpOk,silent,fast,slow:boolean; -cvblks:cvalBlks +END; "cvalCheat=RECORD CASE boolean OF --)vPv RL Pۡ5 Ý ˄ǐ6666á 7á 7777á7á7á7á7/á 5á5 ˡ Ä 5Í ˡ SUWX>ǿەǿٕ " צ.Pؿ ٦תPġ á ٦Undef.תPáצFinishedP<    &     ( //#ڤ./j. //#ڤ/ڤ/./ڤ Vz 10a 5106d؏ :ڪP R áBPress [RETURN] to continue._S h ,؝37/Q7Q746š3š  03á04Ȅ6 3 /0121410/Ȅ71 á121110/š2š211132ō4/ɍ7a0ʀʀȡʀ̀ʀʀ ʀÍʀʀ Í݂ݎ̀[2Pʀá[ Pʀ[צʀÍʀ0<ުP (Y or N)?P 132_YN2ڡ 1XR70 á 00 ܪPƀʀʀƀƀƀƀPƀʀʀ ̀ʀ̀ʀ ̀̀ʀʀ ̀ʀƀʀʀ[צNʀ̀ʀ̀ʀʀʀ[ƀƀʀʀʀ ̀ƀƀƀʀƀצƀ ̀ʀʀ ˍʀƀʀá^ ƀ۪P[ڪP2٪P تPƀצ?ulrd Pƀ ƀ ƀ ̀̀ʀ̀̀̀ʀʀȡƀׯ ƀ.ƀ̀ʀ̀ƀƀʀƀ ƀƀʀ2ڪP ٪P[ [\ צw\2\ ]a؄  Ʉ] Í]]2ױ\Ǹܕ  2צ ׯ6^2\ ^]\ ]Í]Í[[ [[(S:STRING;VAR CT,X,Y:INTEGER;ERASE:BOOLEAN):BOOLEAN;  PROCEDURE WRTLNS(ST:STRING;VAR X,Y:INTEGER;LF,SECPAUSE:BYTE);  PROCEDURE MESSG(S:STRING;LF,SECPAUSE:BYTE);  PROCEDURE PCR;  PROCEDURE HOME;  PROCEDURE MARKSPOT(VAR Y0:INTEGER);  PROCEDURE GOTOSPOT(Y0:INTEGER);  PROCEDURE BOX(X0,Y0,X1,Y1:INTEGER);  PROCEDURE EXPRBOX(VAR EX:EXPR;B:BLOC;XB,YB:INTEGER); PROCEDURE SCROLL(XLEFT,XRIGHT,YTOP,YBOT,LINES,PAUS:INTEGER);  IMPLEMENTATION E :BYTE; /ITEMS,DO_MSG,CHGMSG,RETMSG:STRING);  FUNCTION MSGYN(S:STRING;VAR CT,X,Y:INTEGER;ERASE:BOOLEAN):BOOLEAN;  PROCEDURE WRTLNS(ST:STRING;VAR X,Y:INTEGER;LF,SECPAUSE:BYTE);  PROCEDURE MESSG(S:STRING;LF,SECPAUSE:BYTE);  PROCEDURE PCR;  PROCEDURE HOME;  PROCEDURE MARKSPOT(VAR Y0:INTEGER);  PROCEDURE GOTOSPOT  USES {$U :A.LIB}SHORTGRA,GRAFA; PROCEDURE GETOKCH(VAR CHP:BYTE;VAR CT,X:INTEGER;Y:INTEGER; 2VAR CH:CHAR;CUR,OKCH:STRING;LCASEOK:BOOLEAN); PROCEDURE MENU(M:MSGTYPE;REC,OPTIONS:BYTE;VAR CHOICE:BYTE; /ITEMS,DO_MSG,CHGMSG,RETMSG:STRING);  FUNCTION MSGYN,.-X(@ @  6 ^D@! ǿ8r8&HpN,ؤښ4  ۧč4ڧ٧ ؏*٪P.-.-  T a s ۝ GGە6 Rپ؂צP ˡ. ́-ʁ- Pʁ-RTNǿǿDġ ؤښ ǀ@(߂ ȡ,ާߕە 6  hhhhhhhh4i@Hihi$ Hi(hiɥHH`\t&p "USES {$U :A.LIB}SHORTGRA,GRAFA; "PROCEDURE CIO(VAR ZOUT:REAL;VAR OUTST:STRING;INSTR:STRING;SRCE:SOURCE; 0BASEVETO:VETOSET;XB,YB,CMAX:INTEGER);  IMPLEMENTATION E  #2L 8<=>F?A:CGJJLʷ"L(  USES {$U :A.LIB}SHORTGRA,GRAFA;  PROCEDURE ADDCH(A:ASCII;VAR ST:STRING);  PROCEDURE APPEND(AST:STRING;VAR TAR:STRING);  PROCEDURE PUTPARS(VAR S:STRING); FUNCTION ASCSGN(A:ASCII):BOOLEAN;  FUNCTION REALST(ST:STRING;VAR C:BYTE):REAL; PROCEDURE STREAL(ō梀ؤÏ á á梁#梁;梁#ݤ ń梀 梀梁#ݤ ɍ  á(梀ݤ梀ݤ  墁#ݤ ɡj  ȡ墁#ݤ ȡhj 墀 墀墁; @*墁;墁#墁;Ä ߕ  n  ˡ梀梁3 á梁#ݤō梀ؤÏ á á梁#梁;梁#ݤ ń梀 梀梁#ݤ ɍ  á(梀ݤ梀ݤ  墁#ݤ ɡjآ#آj  áآ7آ#N آآ   آjآ#  آ3   á3 l١ ˡ梀梁3 á梁#ݤ E CL<<ʷZ\\ʷxR` [E :E BODY3 WRITELINUNITPARTCOMPOPTINUMSTRIN\\ER.CODE1\.TEXTGb[h:mng>ʷB `^ph.CODE.CODEACKE.CODE1.TEXTG[:mƳgEʷ "USES {$U :A.LIB}SHORTGRA,GRAFA; "CONST YOF=5; "PROCEDURE DRAWBARS(VAR EX:EXPR;BH:BLOC;XB,YB:INTEGER;M:MODE; 5STARTONLY:BOOLEAN;BEGPTR:PLACE); "PROCEDURE SHOBLOCK(VAR EX:EXPR;B:BLOC;XB,YB:INTEGER;M:MODE; 5FLASHES,CSPAUSE:INTEGER);  IMPLEMENTATION   0.á@p ^P4-ٳ(`áJ 4 ؊0@{Η.á *`á@{Η @{Η^ ˡڡۡ   ݪP  ^ˡ ^ P2^`^ooצ05532`aצ,9225Q~p[~06/T~%<~hfem~u[v4̀4ʀȡǞa444 C $PBX=0.á@p ^P4-ٳ(`áJ 4 ؊0@{Η.á *`á@{Η @{Η^ ˡڡۡ `Ŷ!^ á  -Ä^`á#ö^`?á`á á ` ˶Ä  .á  .R^^B35ȸ^^5333_`Ä5^Fɡ 222+_4 ظ4  `á^ `0 ء  4 ɡצ^*Pس__Ʉš 5P$5^P`á5? `á5 ^3R ö^ 44  4 Ŷ4ĄCL<<ʷZ\\ʷxR` [E :E BODY3 WRITELINUNITPARTCOMPOPTINUMSTRIN\\ER.CODE1\.TEXTGb[h:mng>ʷB `^ph.CODE.CODEACKE.CODE1.TEXTG[:mƳgEʷVAR ST:STRING;Z:REAL;SF:INTEGER);  FUNCTION APPROX(Z:REAL;SF:BYTE):REAL; PROCEDURE SHUFFLE(VAR SHF:SHFARRAY;MX:INTEGER);  FUNCTION BINOPLOC(VAR ST:STRING;LOC:BYTE):BOOLEAN;  PROCEDURE NUMSUB(SUB:STRING;VAR TAR:STRING;C0,C1:BYTE; ,TP,MSG:BOOLEAN;VAR AST,PAR:BOOLEAN); PROCEDURE APPROXSTR(Z:REAL;SF,SFMAX:BYTE;VAR AP:STRING);  FUNCTION SMALLDIF(Z1,Z2,ERR:REAL):BOOLEAN; FUNCTION VERYCLOSE(TAR,TRY:REAL;SF:BYTE;SFONLY:BOOLEAN):BOOLEAN;  PROCEDURE GETXVALS(RND:BOOLEAN;N:VARPOS;RX:ROW;ZMIN,ZMAX:INTEGER);  PRO ݪP00 11\ˡ1b1)á30200&11iɄ1a2102307030270*1(á0 701ȡ 1 \13 h   t |١MڀÄɄ  ń )@ Ä ޮ Ä؄  ܹڂ(ڕ!ڏچ*/ %"  :7+3צ P öÄ öń'Xؕ  צ-Pxؓ *ؓ ءš CL<<ʷZ\\ʷxR` [E :E BODY3 WRITELINUNITPARTCOMPOPTINUMSTRIN\\ER.CODE1\.TEXTGb[h:mng>ʷB `^ph.CODE.CODEACKE.CODE1.TEXTG[:mƳgEʷ "USES {$U :A.LIB}SHORTGRA,GRAFA,STRAP; "PROCEDURE EXMAKE(VAR INST:STRING;MINCO,MAXCO,MINEX,MAXEX, 'PRPOSNEG,PRADDSUB:INTEGER;VARCHG,SHUFL,OMIT0:BOOLEAN;VAR XSUB:INTEGER);  IMPLEMENTATION E <=>F?A:CGJJLʷ"L(*Í22   ݕ PV Ʉ=/ @ 2 ڡ[[[2 [ 2 2ȡEܡݤ $ݤٕŕL Z צ System error.Hold [CTRL] and press [RESET]. ndPL$\2š 2Í22   ݕ PV Ʉ=/ @ 2 ڡ[[[2 [ 2 8 ōھ@0 *ײ P, ߪPń -ÄB333 3+Í +-3  -Ä@ 2š2,Pá 0Pߡ0. -P`{pT  ؂ š ȡݤޕȡ' ݤݤܤܤۚ šg:X  v ɡ%؀צP  $   ? ȡ9 =  0ނ  ȡ 0ؑ ȡ0Pɡ1݂ɡצ.10)51=133100.35/Lb  =̲,4پáٕ# 2@{ΗۦUndef.תP0Páצ Pٿ٪PPRצ(P),ȡ 000۪P5.3/00-á..053 3000.á<CEDURE ERRORQUIT;  IMPLEMENTATION E APPROX(Z:REAL;SF:BYTE):REAL; PROCEDURE SHUFFLE(VAR SHF:SHFARRAY;MX:INTEGER);  FUNCTION BINOPLOC(VAR ST:STRING;LOC:BYTE):BOOLEAN;  PROCEDURE NUMSUB(SUB:STRING;VAR TAR:STRING;C0,C1:BYTE; ,TP,MSG:BOOLEAN;VAR AST ɏ   ؿ ڶ ȡ ھ۹S     ɡ-   ؊ +}F]  "$&(*,.02468:<>@BDFHJLNPRTVXZ\^`hjlnprtvxz|~\˂ צ 0P +á #A02\P ء  a3ٳ`a&a cŏcš  @ٿaÝɄaz ˍ bŶ !`bá7 j^ áb áb ?áb á  á b ػ +ö -Í -á '@!ب  - <  \+,ö \ -Ä+ɡl^g  ˡNس@aa5٢٢j[٢٢;٢jZb ء   |ö ö` [ ؓ ,Yؓ  á  öÄ ءYY^``8 š- ,Y á  á YY á^   ˡfr ?š  \@ ٿצخ ,Y*á`؝ á leftצerase a character G áצupstart an exponent $ á  á  ġ@ á_[Z  ۚ   á ٸĄ á[[ ز[Z ö]TPɡ ɡخ آj   آ;آj:Xqȸ`` qXXXa_bÄ,.02468:<>@BDFHJLNš qP5q^Pbáq? báq báq `X TVX  ˡ ,,,j[ ˲Ą Ŷ[ ɡ jצ^*Pس__ɡ    Vabsolute value CB denominator T  Bexponent  5Bצradical %J N3X)Pw  "$&(šP&8  ڪ٪# $ v. צdownend your exponent & צخ  [[  ٶڢj$š ٶk&qa Ŷ`     cp@$k,  ,^ˡ ^ײ,PYa`bP ٪ت ODE);  IMPLEMENTATION E R` [E :E BODY3 WRITELINUNITPARTCOMPOPTINUMSTRIN\\ER.CODE1\.TEXTGb[h:mng>ʷB `^ph.CODE.CODEACKE.CODE1.TEXTG[:mƳgEʷ "USES {$U :A.LIB}SHORTGRA,GRAFA,SHOBL; "CONST MAXCODE=63; "TYPE CODEPOS=0..MAXCODE; 'CHARCODE=PACKED ARRAY[CODEPOS] OF CHAR; "PROCEDURE IO(VAR EX:EXPR;SRCE:SOURCE;BASEVETO,PWRVETO:VETOSET; .XB,YB,CMAX,FRACMAX,DEPTHMAX:INTEGER;INSTR:STRING;TASC:CHARC3zp & pz @@p@pōaAzkAkȡ{Aiɡ Aa [Apɡ Aa Cۡ5ڡ Aap3Ap Aa@@@@zšp@ AaAAA a@k@kȡ@ @@  @@ȡ`@AAaġ:Apɡ/B AaB@@ AaAi@@A AAAZȄA @@ׯ0P=á 0P=á0 |F6*$ az 3zp & pz @@p@pōaAzkAkȡ{Aiɡ Aa [Apɡ Aa Cۡ5ڡ Aap3Ap Aa@@@@zšp@ AaAAA a@k@kȡ@ @@  @@+:"^ %\% .á  .%= 0 .áH&%  0@{Η<' )_ bá0] ' .á&]!@{Ηbá ` ܢ*ܣ)@ܣ)i $   ˡ خ./˄ >( ݢ#ؤݢ#ؤݢݢ#٨QܢOÂܢOšەܢOá ܢOhؼ!ؼ^]k  س@{Η4 @{Η@{Η   ?^-@U % LINEAR,IDENT:BOOLEAN; % XFACTOR,SOLVED:EQNTYPE %END;  FUNCTION EVAL(ES:EXDAT;RW:ROW;VAR RHS:REAL):REAL;  PROCEDURE VARSORT(VAR VNEW:BYTE;ES:EXDAT;INIT,NEWVAROK:BOOLEAN);  FUNCTION IDENTICAL(STEPL:STEPLIST;INIT:BOOLEAN; 0COUNT:INTEGER;VAR FINITE:BOOLEAN):BOOLEAN; PROCEDURE LINCHK(S:STEP;V:VARPOS;VAR EDAT:EQNDATA);   IMPLEMENTATION E %EXDAT=RECORD 'ESTEP:STEP; 'ESIDE:SIDE %END; %STEPLIST=PACKED ARRAY[DVCOL] OF EXDAT; %EQNTYPE=ARRAY[SIDE] OF BOOLEAN; %EQNDATA=RECORD % ROOT:REAL; % LINEAR,IDENT:BOOLEAN; % XFACTOR,SOLVED:EQNTYPE %END;  FUNCTION EVAL(ES:EXDAT;RW:ROW;VAR RHS:REAL):REAL;  PROCEDURE VARSORT(VAR VNEW:BYTE;ES:EXDAT;INIT,NEWVAROK:BOOLEAN);  FUNCTION IDENTICAL(STEPL:STEPLIST;INIT:BOOLEAN; 0COUNT:INTEGER;VAR FINITE  USES {$U :A.LIB}SHORTGRA,GRAFA,STRAP;  CONST LSIDE=0;LRSIDE=1;RSIDE=2;  TYPE SIDE=LSIDE..RSIDE; %EXDAT=RECORD 'ESTEP:STEP; 'ESIDE:SIDE %END; %STEPLIST=PACKED ARRAY[DVCOL] OF EXDAT; %EQNTYPE=ARRAY[SIDE] OF BOOLEAN; %EQNDATA=RECORD % ROOT:REAL; ` $$n!: P` * L  D h l2^.<Zrnd2٤Zá#jpák t  Ǣ UVWݢ)@]ܢj^P^P \[Z ޢ;ޢPޢ#^p  š0ܢOܣPܢO ܢ#ܢjܢ#ܢ# ,٪P ب @1ȡ#P٤P/ ō21PZ <ġ !#" ٤Zá#jpákەššxe / ڣPȡڢؤ٤ڢؕ٤&<1 1  á٣P*2 P P3ٻ^ˡ#já ظ[٤ݢۤؤقɶقō áݢ3ݢۤؤš ݢۤؤٚá4 0 ńk0ܢ3ܢܢ3öܢڤەōܢڤ c, á."- cڍ\١-ړ * *  c@  (z # ݣPȡ5ȡ#ݢܤڤݢܤڤܢjآjá M[[\U .(UUUVWá  \ á l.!bŶ @$ á)x   (` á@ (G (á (. á+"ܢ7ۻ[ ٮ /[šܢܢ#ۤ[[ɡظ[ܢܢj[**VVUU )U W  (WWUU2+ ., ݢݢ#ݢܤݢۤݢj۾ˏـš9 ˡȡݢڤݢڤق)  * U V ܢjܢj Ą%`Xqš`  ܣP[ ܣP /-) ܕ܊   Z ) @{Η)  @&s 0_p$܊      e ȡ*! @{ΗڑšV@{Η@{Η@{Η"ڡ   ܊               )޶Ʉ  &     S^ $ ٳ=ټ ؼ  @{Η@{Ηȡ  Q? ܕܕݢ ݢ 0    8 ȡޤ@{Η6š޶ɡ@{Η@{Η;LAB:INTEGER); "PROCEDURE DRAWAXES; "FUNCTION COREAL(RW:ROW;N:INTEGER;NV:VARPOS):INTEGER; "IMPLEMENTATION E R.CODE1\.TEXTGb[h:mng>ʷB `^ph.CODE.CODEACKE.CODE1.TEXTG[:mƳgEʷ "USES {$U :A.LIB}SHORTGRA,GRAFA,STRAP; "PROCEDURE LOCAXIS(N,PXBLMIN:BYTE;BEGPOS,ENDPOS:VARPOS; ,ENDROW:ROW;USENDPT:BOOLEAN); "FUNCTION REALCO(CO:INTEGER;N:BYTE):REAL; "PROCEDURE AXBAR(N:BYTE;STDCOLOR:BOOLEAN); "PROCEDURE DRAWAXIS(N:BYTE;LAB0:BOOLEAN$$$8 4$%$84$1$+$+$%$+$@{Η7$+$87$7$%$4$%$8$$7 7@{Η7+71*(0lBz  Zz$9$9ȡm%$$$%$+$$$+$$$$8$8ȡ1$$$$$8 4$%$84$1$+$+$%$+$@{Η7$+$87$7$%$4$%$8$$7 7@{Η7+ z$9$9ȡm%$$$%$+$$$+$$$$8$8ȡ1$$5 @{Η8  z 788ȡ" 99ښ97 7+ %+G ǦB 88   Q߾ޝaáޚء a áء?az ȡ0aŝɄa7 ݨńܡ3 ȡ%G ǦB   ڤɡ (ɡ:@ɡ 1aɡ*@a   ۤ@{Η ڤ    ܨ \ ,ڨ١ p_N=@{Η*/ dUH;  0? 4'@ 2nQe   @{Ηފ @{ΗG.ފ     q W z -- á'----Tt  ܢ( Äۢ ٕٕۢۢۢۢ٤ j   &  ۢڤۢ4 #   USES {$U *A.LIB}SHORTGRA,GRAFA,STRAP,SHOBL,GRAFC,CONIO,EVALU,AXDRW;  TYPE CSET=SET OF DVCOL;  FUNCTION ONSCREEN(RW,NV1,NV2:BYTE):BOOLEAN; PROCEDURE CONBAR(RW,NV1,NV2,N,CT:BYTE);  PROCEDURE PLOT(RW,NV1,NV2,FCT,ERX:BYTE;UP,HP,PX,PY,C2:BOOLEAN;VAR ERR:I  _  áB @ t<d ;⢁e;⢁d ⢁b   !   ˄?á  ˡߑ Bá.ˡ      dڨáReviewBeginn  ˍ  ! ب     U⣁c ⢁c⣁cP١⢁e;⢁e;⢁d ⢁b   !   ˄?á  ٦Shall we do another lesson J بܕ   ١V    ŴĄ;צ#04:USTRT.CODEP; 0; 0;  ddeePf ePd ,,# 6& ^__ȡٶ^ٶ čٶ   Äړٶ Äڡ ٝ ۡ5צIf x=#P߸a  ``ȡK aš5ŏ,"R!ءڶ צPlease evaluate: ء1ݓ.1 1# 1dݡء!ڤ ض   #تPƏݢK ڤ   ܸV6צ 2,"@{Η"L  Q٢٢ Q٢٢   (ݢݢاݢa۶ azȡ/ašٿ ȡ٢٢$  `1ȡȡ ٮ82'FI ضPZ ȡ\٢ȡ0٢Q٢ȡVQ٢٢ۢ٢٢٢Qɡ ܢO6٤؂*Qܢܢ#ڕڕ:  ٢٢٢ height~=~=)Pۓ =)Pړ =)P ݡ צ   צ ܡGڄ&צThe lines meet at the point צThus, this is where     e ݶܶō     `١(,)תP ̀̀ʀġ=) =)Pʀaġ*X~=~=)P=)ʀöڳ ڳ  ۶ˍ ڹەۂ~ۂwەp;h$ 7 "$&(*,.02468:<>@BDFHJLNdRTVXZ\^`bdfu    ?Í? "٪  š    Fڡ$ ߢߢ 2ت     ?ُ؏:     ݢلݢöڕnݢaġ צcorrespond to =)Pצhave =)P=)צPoints on this line ڡڂڡڕ$. ȡ *   áߢߢ ߢߢ  XتPP.P2R0ö   /٪PتPۡ/ái/theצeach /צanotherצmore /valueצvalues /צthisthese /variableצ variables /צxy ܝ  !/ (";"=up,~"/"=down)צ^v /צ^v YXYX/YX  ە5&5צ , and x=#P    & `aaQ`` is~#.&^צ dٝdړۂ؝ٶĶŶJf,(%  č ɕצLet's try more values: dȡ) ɡ 2%'7  ȡ4 ɡ  ..// //.آ צUSTRTPצ#04:P 0 0Zx -ء-  Welcome to Algebra Mentor by John C. Miller.تPǮG ǶG BǂB,,,,,AšTRš%%ˡk..á"šd= Filling memory card. ƃ ƃ ƃ p@ @ 2\ $0 $:Í áضP   ݄ Ě Ív`M M M  (ɡɡ..ݕšݕޏޏނ!:  0 RAMƃ ڦ USTRT.CODE  ̃ʃ̃ʃ.DD00................תPʃڻʃ ٻʃ @  ʃ @ @ @ آ  ت  ["áJM Ä6 ػ  ۪M M ɡ M M 0 F ڢצSYSTEM.MISCINFO ڢMSG.DATA ڢPRO.DATA ڢLES.DATA ڢNES.DATA ڢDUS.DATA צ System error.áDisk is write-protected. 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