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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

where we get a research paper on Nano chemistry....?
Maira Reply
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
Ali
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
hey
Giriraj
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
ya I also want to know the raman spectra
Bhagvanji
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
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
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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