Exam (elaborations)
mathematics
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81x+1 + 34x = 246 34(x+1) + 34x = 246 3 4x x 34 + 34x = 246 Let 34x = y 81y +y= 246 82y=246 82 82 y=3 34x=31 x M1 M1 A
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MARKING SCHEMEMATHEMATICS
FORM 3
No Calculations Marks
1 81x+1 + 34x = 246
34(x+1) + 34x = 246
M1
34x x 34 + 34x = 246
Let 34x = y
81y +y= 246
82y=246 M1
82 82
y=3
34x=31
A1
x
2 35x – 2y = 35
32x-y=31
5x – 2y =5x2 M1
2x – y = 1 x5
10x – 4y = 10
10x – 5y = 5 -
y =5 M1
2x – 5= 1
A1
x=3
, 3 √6.458𝑥10−2 = 6.5613 x 10-1 = 0.65413 M1
M1
1
) = 2 ( 0.2319 x 10 ) = 4.638
M1
(4.638)2 = 21.511
0.65413 + 21.511 = 22.16513 A1
4 3y + 2x = 5
M1
y=
m
m M1
- A1
-2k=12 + 2
K= -7
5 If 4 = 64 3
=? M1
3 𝑥 64
= =
4 48cm
M1
V.sf=(
If 27 = 810 64
=? A1
= 1920g
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