Answers - Pearson Global Schools
Answers - Pearson Global Schools
Answers - Pearson Global Schools
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<br />
<br />
Mathematics B<br />
7 a (<br />
2x 1 2 y<br />
2x 21 1 2y 23<br />
4<br />
5x 3 1 5y<br />
c x 5 22, y 5 3<br />
21 ) b (<br />
27<br />
3 1 x 2 y 28<br />
5 2 x 1 2y )<br />
Multiple choice 6<br />
1 C 2 D 3 B 4 C 5 A<br />
6 A 7 D 8 A 9 B 10 D<br />
Self-assessment 6<br />
1 $546<br />
2 ¥4098 : R1596 : R9222<br />
<br />
<br />
<br />
<br />
3 a y 5 8x b y 5 80 c x 5 5<br />
1<br />
4 a y 5<br />
___<br />
64 x3 b y 5 512<br />
48<br />
5 a y 5<br />
___<br />
x b y 5 6 c x 5 4<br />
9000<br />
6 a N 5<br />
_____<br />
d 2 b N 5 2250 c d 5 3<br />
7 a A 5 15h 2 b A 5 135 m 2 c h 5 6 m<br />
8 a x 5 60°, y 5 60°, z 5 55° b x 5 40°, y 5 70°, z 5 40°<br />
9 a BP 5 1.6 cm b CQ 5 4 cm<br />
10 20.1 cm, 30.2 cm 2<br />
11 a 28.6° b 3.02 cm<br />
12 {22, 17, 12, 7, 2}<br />
13 a 263 b 598 c 3 2 2x (3 2 x)<br />
d (3 2 2x)(6 2 2x)<br />
1 2 x<br />
14 a<br />
_____<br />
3 b 1__ x<br />
c x is equal to either of the answers below<br />
x 5 22.30278, x 5 1.30278<br />
2<br />
d ( 21 2 <br />
3__ x ) <br />
15 a 99 b 4 c x 5 20<br />
16 a ( 21 5) b (<br />
3<br />
21) c √___ 41 <br />
17 a 5 1 b 5 23<br />
1 4<br />
22 1 )<br />
18 a ( 2 4 28<br />
28<br />
<br />
22) b ( 27<br />
Exercise 146<br />
4 27 ) c 1__<br />
9<br />
(<br />
<br />
<br />
1<br />
1_<br />
9 2 __ 1<br />
10 3 1_<br />
8 4 1_<br />
8 5 9<br />
1<br />
6<br />
__<br />
64 7 3 8 2 9 __ 1<br />
16 10 1_<br />
9 2<br />
11<br />
__ 1<br />
16 12 1_<br />
2 13 16 14 625 15 2.84<br />
16 0.167 17 0.0123 18 46 700<br />
19 0.0370 20 0.111 21 64<br />
22 a 23 c 23 24 e<br />
25 a 22<br />
Exercise 146*<br />
<br />
1<br />
1<br />
__<br />
64 2 5 3 1 4 512<br />
5 12.5 6 4 7 10 8 8<br />
9<br />
1_<br />
2 10 2 __ 1<br />
36 11 0.364 12 1.92<br />
13 0.001 37 14 a 2 15 2c 24 16 3a 22<br />
<br />
17 12a 21 18 a 19 c 21 20 2<br />
21 2 22 23 23 k 5 2<br />
1_<br />
3 24 a23<br />
25 b 26 2a 22 27 5a 22 28<br />
1_<br />
29 29a 6 30 <br />
b_<br />
a <br />
Exercise 147<br />
1 <br />
1_<br />
3 2 1_<br />
4 3 1_<br />
9 4 1_<br />
4 <br />
1<br />
5 27 6 __<br />
27 7 0.224 8 0.376<br />
9 36.5 10 0.0540 11 b 21 12 d<br />
13 f 21<br />
Exercise 147*<br />
1 <br />
1_<br />
6 2 6 3 16 4 __ 1<br />
16 <br />
5 1.29 6 0.894 7 2.85 8 0.351<br />
3 <br />
<br />
9 a 22 10 c 2 11 e 12 9<br />
13<br />
__ 1<br />
36 <br />
Exercise 148 (Revision)<br />
1<br />
1 __<br />
16 2 10 3 4 4 8 5 5<br />
1<br />
6 5 7 __<br />
64 8 1_<br />
4 9 __ 1<br />
11 10 9<br />
1<br />
11 __<br />
81 12 27 13 362 1_<br />
2 5 ____ 1<br />
36<br />
1_<br />
2 5 ____ 1<br />
√ 36 5 1__ 6<br />
14 9<br />
3_<br />
2<br />
5 ( 9<br />
1_<br />
2 ) 3 5 ( √ __ 9 ) 3 5 3 3 5 27 15 a 2 16 a 4<br />
17 d 22 18 b 23 _ 2 19 b <br />
5_<br />
2<br />
20 c<br />
Exercise 148* (Revision)<br />
<br />
<br />
<br />
1<br />
1<br />
__<br />
32 2 6 3 1 4 3<br />
5 4 6<br />
1_<br />
7 7 64 8 8<br />
9<br />
1_<br />
9 10 ___ 1<br />
625 <br />
11 (0.125) 2 2_<br />
3 5 ( 1__<br />
8 ) 2 2_<br />
3 2_<br />
5 ( 8__<br />
1 )<br />
3 1_<br />
3<br />
5 ( 8<br />
) 2 5 ( 3 √ __<br />
8 ) 2 5 2 2 5 4<br />
1_<br />
3<br />
12 ( 4<br />
) 21 1_<br />
2 1_<br />
3<br />
5 ( 4<br />
) 2 3_<br />
2 5 4 2 1_<br />
2 5<br />
1__<br />
1_<br />
2<br />
4 ___ 1<br />
√ 4 5 1__ 2<br />
13 3c 14 5b 22 15 a 2 16 3c 22<br />
17 2a 21 18<br />
7_<br />
d 6 19 29a 6 20 2<br />
Exercise 149<br />
1 x 5 22 or x 5 21 2 x 5 23 or x 5 2 3 x 5 25 or x 5 22<br />
4 x 5 23 or x 5 5 5 x 5 3 6 x 5 26 or x 5 2<br />
7 x 5 21 or x 5 0 8 x 5 0 or x 5 4 9 x 5 2<br />
10 x 5 26 or x 5 6<br />
Exercise 149*<br />
1 x 5 25 or x 5 21 2 x 5 21 or x 5 4 3 x 5 28 or x 5 27<br />
4 x 5 25 or x 5 9 5 x 5 7 6 x 5 25 or x 5 8<br />
7 x 5 0 or x 5 13 8 x 5 0 or x 5 217 9 x 5 9<br />
10 x 5 211 or x 5 11<br />
Exercise 150<br />
1 x 5 <br />
7_<br />
<br />
2 2 x 5 ___ 9<br />
4<br />
3 x 5 22 or x 5 0<br />
4 x 5 0 or x 5 1 5 x 5 2 or x 5 3 6 x 5 0.5 or x 5 2<br />
7 x 5 21.5 or x 5 21 8 x 5 22 or x 5 21 9 x 5 23 or x 5 3<br />
10 x 5 0 or x 5 2 11 x 5 22 or x 5 2 _ 1 12 x 5 − 1_<br />
3<br />
3 or x 5 2<br />
13 x 5 22 or x 5 3 14 x 5 22 or x 5 − <br />
2_<br />
3 15 x 5 24 or x 5 2_<br />
3 <br />
Exercise 150*<br />
1 x 5 <br />
5_<br />
7 2 x 5 8_<br />
3 3 x 5 22 or x 5 0<br />
4 x 5 0 or x 5 <br />
3_<br />
2 5 x 5 1 or x 5 2 6 x 5 1.5 or x 5 2<br />
7 x 5 29 or x 5 2 <br />
4_<br />
3 8 x 5 − 1_<br />
3 or x 5 1.5 9 x 5 2 1_<br />
2 or x 5 2 1_<br />
4 <br />
10 x 5 <br />
2_<br />
5 5 or x 5 5 11 x 5 0.8 or x 5 1.5 12 x 5 − 4_<br />
3 or x 5 7<br />
13 x 5 24 or x 5 4 14 x 5 0 or x 5 3<br />
15 x 5 25 (repeated root) 16 x 5 0.25 or x 5 7<br />
17 x 5<br />
2_<br />
3 or x 5 1.5 18 x 5 5_<br />
3(repeated root)<br />
Exercise151<br />
1 x 5 23.45 or x 5 1.45 2 x 5 21.65 or x 5 3.65<br />
3 x 5 25.46 or x 5 1.46 4 x 5 28.16 or x 5 21.84<br />
5 x 5 214.2 or x 5 0.21 6 x 5 21.53 or x 5 21.5<br />
7 x 5 22.90 or x 5 6.90 8 x 5 27.04 or x 5 17.0<br />
9 x 5 23.56 or x 5 0.561 10 x 5 20.541 or x 5 5.54<br />
Exercise 151*<br />
1 x 5 0.171 or x 5 5.83 2 x 5 0.190 or x 5 15.8<br />
3 x 5 27.58 or x 5 1.58 4 x 5 21.69 or x 5 7.69<br />
5 x 5 20.41 or x 5 2.41 6 x 5 0.258 or x 5 7.74<br />
7 x 5 21.00 or x 5 3.50 8 x 5 21.86 or x 5 20.537<br />
9 x 5 0.27 or x 5 22.77 10 x 5 20.522 or x 5 1.09<br />
Exercise 152<br />
1 x 5 23.45 or x 5 1.45 2 x 5 21.65 or x 5 3.65<br />
3 x 5 25.46 or x 5 1.46 4 x 5 1.84 or x 5 8.16<br />
36<br />
© <strong>Pearson</strong> Education Ltd 2010
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