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BNU1501 May June 2017 Exam Solutions
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- University Of South Africa (Unisa)
BNU1501 May June 2017 Exam Solutions with workings. (Questions and solutions)
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COLLEGE OF ECONOMIC ANDMANAGEMENT SCIENCES
SCHOOL OF ECONOMIC SCIENCES
DEPARTMENT OF DECISION SCIENCES
BNU1501
Basic Numeracy
Solutions to Exam May/June 2017
Unique number: 489785
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, Question 1
A biscuit manufacturer uses 200 g of flour, 50 g of sugar and 100 g of butter for each packet of
biscuits produced. Write an expression for the amount of butter needed to produce 𝑥 packets of
biscuits.
(1) 100𝑥 kg
(2) 0,01𝑥 kg
(3) 0,1𝑥 kg
𝑥
(4) kg
0,01
Solution:
100 gram = 0.1 kilogram
0,1𝑥 kg
Question 2
Simplify the following expression as far as possible:
2𝑏 2 (𝑎 − 1) − 8𝑎(𝑏 2 + 1)
(1) 2𝑏𝑎2 − 2𝑏 2 − 8𝑎𝑏 2 − 8𝑎
(2) −6𝑎𝑏 2 − 2𝑏 2 − 8𝑎
(3) 8𝑎 − 2𝑏 2 − 6𝑏 2 𝑎
(4) −𝑎 − 𝑏 2 − 6𝑎𝑏 2
Solution:
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