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need help with 2005 sc for maths plzzz (1 Viewer)

supre

Member
Joined
Jun 11, 2009
Messages
155
Gender
Female
HSC
2011
i realy need help with these questions and can u plz put the answers in detail

50
71
73
74

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84
50. scale factor basically just means that the pic shown on the paper has been tripled from its actual size. so measure the size of the bug using a ruler then divide the number by 3.
71. i used the probability table to work this answer out and got 12 possible ways.(D)
73. there are 6 faces on the cube and one cube has been halfed so the surface area increased by 2/6 which is 1/3. (C)
74. isabella's brothers age 2 years ago=x-2 and isabella has three times old as her brother so it is 3(x-2) 3x-6 (this is isabella's age 2 years ago) so isabella's age now= 3x-6+2= 3x-4 (B)
 

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