Maths in Focus  Margaret Grove  Pat 1
Short Description
Descripción: Mathematics Preliminary Course  2nd Edition...
Description
PRACTICE ASSESSMENT TASK 1
Practice Assessment Task SET 1 p3 p+1 = 1. 5 2
1.
Solve for p:
2.
Factorise fully: 10x + 2xy  10y  2y 2.
3.
Write in index form 1 (a) x (b)
3
2x + 6 . 2
17. Solve 2x 2  3x  1 = 0 correct to 3 signiﬁcant ﬁgures. 18. The radius r of a circle with area A is A given by r = . Find r, correct to r 2 decimal places, if A = 7.59.
x4
4.
Simplify the expression 8y  2 ^ y + 5 h .
5.
5 Rationalise the denominator of . 5 2 Expand and simplify ] x  3 g ^ x 2 + 5x  1 h .
6.
16. Simplify
7.
3x 2 Solve the equation = . ^ x ! 1h x+1 3
8.
Simplify
9.
Show that TABC and TEDC are congruent triangles. Hence, or otherwise, show that TACE is an isosceles triangle.
x 2  2x  3 x+1 . ' 5 10
19. Solve 5  2x 1 3 and sketch the solution on a number line. 20. Evaluate
3 5 1 2 + + . 20 15 3 12
21. Solve the equation x 2  4x + 1 = 0, giving exact solutions in simplest surd form. 22. Write 7  2 as a rational number. 23. Solve simultaneous equations y = 3x  1 and y = x 2  5. 24. Find integers x and y such that 3 = x + y 3. 2 3+3
10. Evaluate ] 3.9 g4, correct to 1 decimal place.
25. Evaluate 2  2   1  +  4 . 26. Find the value of x.
11. Simplify 2 3  27 . 12. Find the size of each interior angle in a regular octagon. 13. Evaluate 0.72 ' 9.82 in scientiﬁc notation, correct to 3 signiﬁcant ﬁgures. 14. Expand and simplify
2 ^3 5  2 2 h.
15. Find, correct to 2 decimal places, the ] 2.14 g3 value of . 6.94  3.72
27. Factorise 8x 3  1. 28. Rationalise the denominator of 2 3 . 3 5 2
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Maths In Focus Mathematics Preliminary Course
29. Simplify 2  4    3  +  2 .
41. Solve x 2 $ 9.
30. Find the sale price if a discount of 8% is given on a DVD player that usually sells for $699.
o as a fraction. 42. Write 0.16
5.21 + 4.71 correct to 3.94 # 1.76 2 signiﬁcant ﬁgures.
31. Evaluate 3
32. Rationalise the denominator of
5 +1
. 2 2+3 33. The price of roller skates has increased by 6.5% to $89. Find the price before the increase.
34. Find the values of all pronumerals, giving reasons for each step of your calculations.
35. Find the area of this ﬁgure.
36. Simplify
^ a  4 h3 # b 6
a9 # ^ b1 h
4
38. Evaluate 4
3 2
1 in index form. x+3 45. Expand and simplify ] x + 2 g3.
44. Write
46. Find the value of a 3 b  2 in index form if 4 2 1 3 a = c m and b = c m . 5 2 47. Find the value of x, giving reasons for each step of your working out.
48. Find values of x and y.
.
37. Solve 5x  9 2 21. 
43. Prove that the diagonals in any rhombus bisect the angles they make with the sides of the rhombus.
as a rational number.

49. Write ] 3x + 2 g
1 2
without an index.
50. Simplify (a) 8x  7y  y + 4x
39. Simplify 2 ] x  5 g 3 ] x  1 g .
(b)
124
40. Solve 4 2x + 1 = 8.
(c)
x2  9 x 3 + 27
PRACTICE ASSESSMENT TASK 1
(d) (e)
1 + 2+1
55. ABCD is a parallelogram with CD produced to E so that ED = AD. Prove that +ABC = 2+DEA.
2 21
3 2 4 + x + 1 x2  1 x  1
1 (f) x  x when x = 2 3 (g)
^ x  2 h5 y 4 z  3
x4 _ y3 i
1
^ z  4 h 2
a+b a + 2ab + b ' 3  6b 5a  20ab 2 2
(h)
2
(i) 8 5  3 20 + 2 45 a3 b2 ^ c4 h 1 2 2 3 c m c m , if a = , b = 2 3 ^ a 2 h2 bc 5 4 1 and c = c m 9 2
(j)
51. Find the values of x and y, correct to 1 decimal place.
52. Evaluate x.
2 1 5 3 56. Find the exact value of . 5 16 1 1 57. Tran spent of her salary on rent, 4 3 1 1 on food, on bus and taxi fares, and 5 6 on going out. If she puts the rest of her salary into savings, what percentage of her salary is savings? 58. The speed of light is about 2.99 # 10 8 ms  1 . If a rocket travels at oneﬁfth the speed of light, ﬁnd its speed in kmh  1 (in scientiﬁc notation correct to 2 signiﬁcant ﬁgures). 59. Find the value of k if ] 2x + 5 g2 = 4x 2 + kx + 25. 60. Simplify
53. The volume of a sphere is given by the 4 formula V = rr 3. Find the exact radius r, 3 2 if the volume V is 10 cm 3. 3 54. Find the perimeter of the ﬁgure below, correct to 3 signiﬁcant ﬁgures.
81x 2 y 3 .
61. The sum of the interior angles in a regular polygon is 1620c. Find the size of each interior angle, to the nearest minute. 62. Find the area of the shaded region in this ﬁgure, correct to 2 decimal places.
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Maths In Focus Mathematics Preliminary Course
63. Factorise (a) 5 ] a  2 g3 + 40b 3 (b) ] 2a  b + c g2  ] a + 5b  c g2 64. Solve 2 #
8x  1 1 9. 5
20 m
65. ABCD and BCEF are parallelograms. Show that AFED is a parallelogram. 25 m
71. In the ﬁgure, BD is the perpendicular bisector of AC. Prove that triangle ABC is isosceles. B
66. Find the value of b correct to 2 decimal places.
A
D
C
72. The diagonals of a rhombus are x and y. Find the length of its side. 67. The diagonals of a rhombus are 6 cm and 10 cm long. Find the (a) exact length of the sides of the rhombus (b) area of the rhombus. 68. Write as a single fraction with a rational 2 1 denominator . 3 3 2 2+ 5 69. The exterior angles of a regular polygon are 18c . How many sides has the polygon? 70. A cable is used to support a 20 m tower as shown. If the cable is placed 25 m away from the base of the tower, how long must it be, to the nearest metre?
73. Write
1 in index form. 3 ] x  2 g5 
5 3

5 2
(a) ] x  2 g
]x  2 g (b) 3

(c) 3 ] x  2 g 1 (d) 5 ] x  2 g3
5 2
74. Write the number 54 000 000 in scientiﬁc notation. (a) 5.4 # 108 (b) 54 # 106 (c) 5.4 # 107 (d) 54 # 10−8
PRACTICE ASSESSMENT TASK 1
75. Simplify
^ 2a 3 b h 3
] ab g
2
.
(a) 8a b (b) 8a8b (c) 2a7b (d) 2a8b 76. A computer costs $1850. If it has increased in cost by 4% since last week, how much did it cost last week? (a) $1924.00 (b) $1778.85 (c) $1867.80 (d) $1776.00
o to a fraction. 78. Convert 0.36
7
77. Evaluate 4 (a)  8 (b)
1 8
(c)
1 6
(d) −6

3 2
.
(a)
9 25
(b)
12 33
(c) 3 (d) 79.
1 3
11 30
A E C
B
D
The triangles ABC and CDE can be proven congruent by using the test (a) SSS (b) SAS (c) RHS (d) AAS.
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