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1. As ek die prys van die CD wat ek gekoop het, verdriedubbel en dan R90 by die antwoord tel, kom ek uit by die prys van die R495 draagbare CD-speler wat ek dieselfde tyd gekoop het. Hoeveel het ek vir die CD betaal? Hoeveel geld het ek altesaam uitgegee?

  • Oplossing:Prys van CD × 3 plus R90 = prys van CD-speler

Gestel x is die CD se prys.

x × 3 + 90 = 495 V ertaal woorde in algebra

3 x + 90 = 495 Vereenvoudig

3 x = 495 – 90 Trek 90 af van beide kante van die =

3 x = 405 Vereenvoudig

x = 405  3 Deel deur 3 aan beide kante van die =

x = 135 Vereenvoudig

Die CD het R135 gekos.

Ek het R135 + R495 = R630 uitgegee.

2. Mev. Williams is ‘n toesighouer in ‘n fabriek. Devon Jones is so pas aangestel as ‘n toesighouer teen ‘n weeklikse loon van R900. Sy verstaan dat as R535 van haar weeklikse loon afgetrek word, die oorblywende deel presies die hefte van Devon s’n is. Mev. Williams is bekommerd dat sy nie soveel verdien as die onervare jong man nie. Het sy rede tot kommer? Wenk: Gestel y is Mev. Williams se loon.

3. ‘n Sekere getal is 6 groter as ‘n ander getal. Die som van die twee getalle is 28. Wat is die getal?

  • Oplossing:

(‘n Getal) + (die getal – 6) = 28

Gestel x is die getal; dan is die ander getal x – 6

x + ( x –6) = 28 Vertaal in algebra

x + x – 6 = 28 Verwyder hakies

2 – 6 = 28 Vereenvoudig

2 x = 28 + 6 Tel 6 by aan elke kant

2 x = 34 Vereenvoudig

x = 34  2 Deel elke term deur 2

x = 17 Vereenvoudig

Die getal is 17

Bevestig jou antwoord!

4. Alan en sy suster loop elke oggend reguit skool toe. Elke middag loop Alan weer reguit huis toe, maar sy suster loop altyd by haar vriendin se huis verby op pad huis toe; hierdie roete is twee keer so lank as Alan se roete. Tesame is die oggend- en aandroetes 1½ kilometer. Hoe ver is hulle huis van die skool af?

Dit is belangrik om die probleem om te skakel na algebra, maar dit is ook belangrik om die algebra te kan gebruik om die vergelyking op te los en sodoende die vraag te beantwoord. Dit word nou hier aangespreek. Dit is die stappe wat ons hierbo gevolg het:

  • Verwyder hakies en vereenvoudig: x + ( x –6) = 28 x + x – 6 = 28
  • Maak nou seker dat al die terme met die veranderlike aan die linkerkant van die = teken is, en al die terme sonder die veranderlike aan die regterkant; tel terme by of trek terme af soos nodig, en vereenvoudig: 2 x – 6 = 28 2 x = 28 + 6 2 x = 34
  • As die veranderlike ‘n getal-koëffisiënt het, deel ons beide kante daardeur, en vereenvoudig: x = 34  2 x = 17

Ons gebruik hier al die vaardighede wat ons geleer het by vereenvoudiging van uitdrukkings.

Oefen hierdie vaardighede by die oplos van hierdie vergelykings:

5. (a) 5 х = 35 (b) 4 х = 22 (c) 3 х – 90 = 0 (d) ½ х = 21

6 (a) 5 х + 15 = 35 (b) 8 + 4 х = 22 (c) 3 х – 90 = –60 (d) ½ х + 3 = 15

7 (a) 5 х + 15 = 2 х (b) 8 + 4 х = 22 – 2 х (c) 3 х – 90 = х (d) ½ х + 3 = 4 – ½ х

8 (a) 5( х + 1) = 20 (b) 8 + 4( х – 1) = 0 (c) х ( х + 3) = х 2 + 6 (d) ½ (4 х + 6) = 1

9 (a) 2( х + 1) = х + 2 (b) 2( х + 3) = 2 х + 6 (c) 3 – 2 х = –2(1 + х )

Laat ons ‘n paar van hierdie oplossings ontleed.

Hier is sommige antwoorde:

8 (a) х = 3

(b) х = –1

(c) х = 2

(d) х = –1

  • Hulle is almal aanvaarbare antwoorde.
  • Hulle gee die waarde van die veranderlike ( х ) wat die vergelyking waar maak.

Questions & Answers

who was the first nanotechnologist
Lizzy Reply
k
Veysel
technologist's thinker father is Richard Feynman but the literature first user scientist Nario Tagunichi.
Veysel
Norio Taniguchi
puvananathan
Interesting
Andr
I need help
Richard
anyone have book of Abdel Salam Hamdy Makhlouf book in pdf Fundamentals of Nanoparticles: Classifications, Synthesis
Naeem Reply
what happen with The nano material on The deep space.?
pedro Reply
It could change the whole space science.
puvananathan
the characteristics of nano materials can be studied by solving which equation?
sibaram Reply
plz answer fast
sibaram
synthesis of nano materials by chemical reaction taking place in aqueous solvents under high temperature and pressure is call?
sibaram
hydrothermal synthesis
ISHFAQ
how can chip be made from sand
Eke Reply
is this allso about nanoscale material
Almas
are nano particles real
Missy Reply
yeah
Joseph
Hello, if I study Physics teacher in bachelor, can I study Nanotechnology in master?
Lale Reply
no can't
Lohitha
where is the latest information on a no technology how can I find it
William
currently
William
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
has a lot of application modern world
Kamaluddeen
yes
narayan
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
STM - Scanning Tunneling Microscope.
puvananathan
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Source:  OpenStax, Wiskunde graad 9. OpenStax CNX. Sep 14, 2009 Download for free at http://cnx.org/content/col11055/1.1
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