FORM FOUR MATHEMATICS NECTA 2018

THE UNITED REPUBLIC OF TANZANIA NATIONAL EXAMINATIONS COUNCIL OF TANZANIA CERTIFICATE OF SECONDARY EDUCATION EXAMINATION

041                BASIC MATHEMATICS

(For Both School and Private Candidates) 

Time: 3 Hours                                    Tuesday, 06th November 2018 a.m.

Instructions

  1. This paper consists of sections A and B with a total of sixteen (16) questions.
  2. Answer all questions in section A and four (4) questions from section B. Each question in section A carries six (6) marks while each question in section B carries ten (10) marks.
  3. All necessary working and answers for each question done must be shown clearly.
  4. Mathematical tables may be used.
  5. Cellular phones, calculators and any unauthorized materials are not allowed in the examination room.
  6. Write your Examination Number on every page of your answer booklet(s).

SECTION A (60 Marks) 

Answer all questions in this section.

 1.If    and    find the fraction of   in its simplest form

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  (b).Find the GCF of 210, 357 and 252.

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2. (a). Evaluate log10 40,500 given that log10 2 = 0.3010 , log10 3 = 0.4771 and log10 5 = 0.6990.

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   (b). Find the values of x and y if 

 

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3. (a). In a school of 60 teachers, some drink Fanta and some drink Coca-Cola. If 46 drink Fanta, 18 drink Coca-Cola and 14 drink both Coca-Cola and Fanta. How many teachers drink neither Fanta nor Coca-Cola? (Use Venn diagram)

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(b).Use the figure below to answer the following questions:

 (i). Write the expression for the total area of rectangles A and B.

    (ii). If the total area of rectangles A and B is 98 square centimeters, find the value of x

 

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4.  (a). 

 Find x and y given that 

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 (b). Find the point of intersection of the lines x ? 2y = ?5 and 2x + 7y ? 34 = 0

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5.  In the following figure, a regular hexagon is inscribed in a circle. If the perimeter of the  hexagon is 42 cm, find:

(a) The radius of the circle.

(b) The area of the circle and the regular polygon. 

(c)The area of the shaded region.

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6.  (a)Mukasa received Ushs 1,000,000 from his sister in Uganda. How much did he get in Tanzanian currency (Tshs) if one Ugandan shilling was equivalent to 0.65 Tanzanian shilling? 

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(b)   The energy (E) stored in an elastic band varies as the square of the extension (x). When the elastic band is extended by 4 cm, the energy stored is 240 joules. What is the energy stored when the extension is 6 cm? What is the extension when the stored energy is 60 joules? 

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7.  (a)   Three relatives shared Tshs 140,000 so that the first one got twice as much as the second, and the second got twice as much as the third. How much money did the first relative get? 

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(b) Kitwana paid Tshs 900,000 for a desktop computer and sold it the following year for Tshs  720,000. Find:

  1.  The loss made, 
  2. The percentage loss.
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8. (a)   If an arithmetic progression has A1 as the first term and d as the common difference,  

  1.  write the second, third, fourth and fifth terms.
  2.  Establish the formula for the sum of the first five terms of the arithmetic progression by using the results in part (i). 
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(b) The first and second terms of a geometric progression are 3 and 9 respectively.

  1. Find the third, fourth and fifth terms.
  2. Verify that the sum of the first 5 terms is given by      

    by using the results in part (i).    
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9. (a)   Find the distance PR in the following figure if the lines PR and RQ are perpendicular.

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 (b)  A flagpole is 5 meters high. Find to the nearest cm, the length of its shadow when the elevation of the sun is 600.

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10.(a)   Use factorization method to solve the quadratic equation x2 ? 9x + 14 = 0.

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 (b) Find the values of x that satisfies the equation 

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SECTION B (40 Marks) 

Answer four (4) questions from this section.

11.  A farmer needs to buy up to 25 cows for a new herd. He can buy either brown cows at 50,000/= each or black cows at 80,000/= each and he can spend a total of not more than 1,580,000/=. He must have at least 9 cows of each type. On selling the cows he will make a profit of 5,000/= on each brown cow and 6,000/= on each black cow. How many of each type he should buy to maximize profit?

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12.   The scores of 45 pupils in a Civics test were recorded as follows:

30

65

50

62

40

35

64

32

28

59

60

82

24

35

63

68

46

48

73

92

54

46

63

75

58

43

71

72

27

28

61

71

36

64

80

61

64

76

64

35

76

73

70

64

46

  1. Construct a frequency distribution table of the given data, taking equal class intervals 21 – 40, 41 – 60, …
  2.  Calculate the mean score.
  3. Draw the cumulative frequency curve and use it to estimate the median.
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13.(a)   In the following cuboid, AB = 5 cm, BC = 12 cm and BG = 10 cm. Calculate: 

(i)   The length of AH (give your answer correct to one decimal place).

 (ii)     The angle CAH.

 

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(b) In the following figure A, B, C and D lie on the circle; O is the centre of the circle, BD is its diameter and PAT is the tangent of the circle at A.

If angle ABD = 59 , CDB = 35, find ACD, ADB, DAT and CAO.

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14.Mwanne commenced business on 1st April, 2015 with capital in cash 200,000/=

April  2 bought goods for cash 100,000/=

3 bought goods for cash 300,000/=

4 purchased shelves for cash 230,000/=

5 sold goods for cash 400,000/=

9 paid wages for cash 50,000/=

12 purchased goods for cash 70,000/=

13 sold goods for cash 600,000/=

  16 paid rent for cash 100,000/=

20 bought goods for cash 60,000/=

   25 sold goods for cash 300,000/=

   27 paid salary for cash 70,000/=

Prepare the following:

(a) Cash account, (b) Trial balance.

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15. (a)   Find the point ????(x, y)

 

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(b)A translation T maps point ????(x, y) in part (a) into (3,2). Find where it takes the point (7,4).

(c)  Find the image of the point obtained in part (b) under a rotation of 90° followed by another rotation of 180° anticlockwise. 

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16. (a) A bag contains 6 white shirts and 3 blue shirts. Three shirts are picked at random one after another with replacement. Determine the probability that:

  1.  All three shirts are blue in colour, 
  2.  Two shirts are white and one shirt is blue, 
  3. One shirt is white and two shirts are blue.
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(b)  The function f is defined by

(i) Sketch the graph of f.

(ii) Use the graph to determine the domain and range of f.

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