GRADE 9 MEMO

- 1 -

GRADE 9

FINAL ASSESSMENT MEMO

NOVEMBER 2016

TOTAL: 100

1.1

C

1.2 A

1.3 D

1.4 B

1.5 A

1.6 C

1.7 D

1.8 C

1.9 A

1.10 B

[10]

2.1

9 x.3x+1 32x.3x+1 33x+1

=

= =3

27 x

33x

33x

[3] 2.2.1 3

2.2.2 -9

[2]

2.3

4x 2 (5x3 - 3x) - 2x(x4 - x3 )

= 20x5 - 12x3 - 2x5 + 2x4

= 18x5 - 12x3 + 2x 4

[3]

- 2 -

2.4

4x - 6 = x + 8

2

3

3(4x - 6) = 2(x + 8)

12x -18 = 2x + 16

12x - 2x = 18 + 16

10x = 34

x = 3,4

[3] 2.5

a = -b - 2 Substitute : b + 2(-b - 2) = 4 b - 2b - 4 = 4 -b =8 b = -8 a = 6

[4] 2.6.1

2x 2 ( y -1) + (1 - y)

= 2x2 ( y -1) - ( y -1)

= ( y -1)(2x 2 -1)

[3 ] 2.6.2

144x6 - 25y 4

= (12x3 + 5y 2 )(12x3 - 5y 2 )

[2]

2.6.3

1 x2 - x + 3

4

4

= 1 (x 2 - 4x + 3) 4

= 1 (x -1)(x - 3) 4

- 3 -

[3] 2.7

p ? 2p2 +3 - (5p + 6p2 +1)

-4p ? 8p2 + 2

[3]

3.1 20 ; 1

[1]

3.2.1 Add (9) to get the next term

[1]

3.2.2 y = 9x

[2]

3.2.3 135= 9x

15 = x

[2]

3.3

Figure

1

Number of blocks

3

3.4 Pattern number(p) Number (3p - 2)2

-2 -1 64 25

2

3

5

5

7

11

[2]

0

5

10 20

4 169 784 3364

[3]

3.5

- 4 -

[3]

3.6

x + (x + 1) + (x + 2) = 126

3x + 3 = 126

3x = 123

x = 41

The three numbers are 41 , 42 and 43 [3]

3.7

A = P(1 + i.n)

A = R24500(1 + 0,08.5)

A = R34300

Interest = R34300 - R24500 = R9800

[4]

4.1.1

ABO and CDO:

^

^

AB = CD (given) or ( AO B = C O D(opp. ................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download