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4.4 Jessica koop drie keer soveel lemoene as piesangs. As die lemoene 45c elk en die piesang 18c elk kos, hoeveel van elke soort het sy gekoop as die totale koste R 18,36 was?

4.5 Cameron is agt jaar ouer as Liam. Ses jaar gelede was Cameron drie keer so oud soos Liam. Hoe oud is hulle nou?

4.6 Jy het 50 seëls by die Poskantoor gekoop. Dit sluit R1,20 seëls en R2, 40 seëls in.Indien die totale waarde van die seëls R 58,80 is, bepaal hoeveel jy van elke soort seël gekoop het.

4.7 Verdeel ’n stuk tuinslang van 18 m in twee dele, sodat die een stuk 550 mm langer as twee keer die ander stuk is. Bepaal die lengte van die twee stukke tuinslang.

4.8 18 vrouens en 25 dogters het ’n totale massa van 3 792 kg.Die dogters het almal dieselfde massa en elke vrou weeg drie keer swaarder as ’n dogter. Bepaal die massa van ’n vrou en ’n dogter.

4.9 Die ene-syfer van ’n tweesyfer-getal is dubbel die tiene-syfer van die getal. As die twee syfers omgeruil word, ontstaan ’n getal wat 36 meer is as die oorspronklike getal. Bereken die oorspronklik twee-syfergetal.

  • Daar is 25 meer leerders in graad 10 as in graad 9 en 32 meer leerders in graad 8 as in graad 9. Indien die totale aantal leerders van grade 8 tot 10 732 is, bereken hoeveel leerders daar in elke graad is.

L e ereenhei d 2 Assessering 2.1

Assessering van myself: deur myself: Assessering deur opvoeder:
Ek kan… 1 2 3 4 Kritieke Uitkomste 1 2 3 4
eenvoudige vergelykings oplos d.m.v. inspeksie; (Lu 1.8); Kritiese en skeppende denke
eenvoudige vergelykings oplos en die korrekte antwoord uit ’n gegewe versameling kies; (Lu 1.8); Deelname
hakies verwyder en dan ’n vergelyking oplos; (Lu 2.5; 2.8.4); Organisering en bestuur
vergelykings oplos waarin breuke voorkom; (Lu 1.8; 2.5) Prosessering van inligting
woordprobleme in algebraïese uitdrukkings uitdruk, (Lu 2.8.6); Kommunikasie
en dan vergelykings oplos. (Lu 2.5). Probleemoplossing
Selfstandigheid

goed gedeeltelik nie goed nie

Kommentaar deur die leerder: My plan van aksie: My punte:
Ek is besonder tevrede met die standaard van my werk. < Datum :
Ek is tevrede met die vordering van my werk. Uit:
Ek het hard gewerk, maar is nie tevrede met my prestasie nie. Leerder :
Ek het nie my beste gelewer nie. >
Kommentaar deur ouers: Kommentaar deur opvoeder:
Handtekening: Datum : Handtekening: Datum :

Tutoriaal: (Vergelykings)

Totaal: 50

1. Beskou die volgende: 5 x = 1

1.1 Stel bogenoemde ’n “vergelyking” voor? Gee ’n rede vir jou antwoord.

[2]

1.2 Bepaal nou die moontlike waarde vir x deur inspeksie.

[1]

2. Bepaal die waarde van a in elk van die volgende gevalle, deur slegs die antwoord neer te skryf (INSPEKSIE)

2.1 a + 7 = 19

2.2 5 a - 7 = 28

2.3 6 a - 7 = 3a

2.4 4 a / 3 + 5 = 9

2.5 4 / 3 a + 5 2 / 3 = 6

[5 x 2= 10]

3. Bereken p in elk van die volgende deur van substitusie gebruik te maak, rond alle antwoorde korrek tot 3 desimale syfers af.

3.1 f = 4(2 b - p ) , f = 32 en b = 9

[3]

3.2 f = p / r , f = 45,67 en r = 21,3

[3]

4. Bereken die waarde van a in elk van die volgende, volledig.

4.1 7 a + a / 3 = 5(2 + 3)

[3]

4.2 a (4 a - 3) = (-2 a

[3]

4.3 -4( a - 2) = 3( a - 4)

[3]

4.4 5( a + 3) + 4 a + 5 = 2( a - 7)

[4]

4.5 5 a = -2( a - 3)

Questions & Answers

Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Wiskunde graad 8. OpenStax CNX. Sep 11, 2009 Download for free at http://cnx.org/content/col11033/1.1
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