Algebra
3x+9=12
x=1
What is 60% of 10
6
9 * 12
108
Is this a biased piece of data: Matthew asked her friends about their favorite colour to represent the whole class.
Yes it is
7x+6-3x-2=3x+4-7x+8
What is 35% of 45
15.75
36
Is this biased or reliable and is it census or sample: Kati picks randomly some of her friends to be questioned if they like Russian candy. This represents her friends only.
It's reliable and it's a sample.
x-1 - x+3 = 5
3 4
x=73
27% of a number is 13
48.148148148
4/8*7
3.5 or 3 and 1/2
Make a stem and leaf plot with this data:
111cm, 137cm, 189cm, 134cm, 182cm, 156cm, 149cm, 158cm, 153cm , 172cm, 161cm, 165cm, 1.4m, 1.45m, 1.8m, 2.01m
Stem Leaf
11 1
12
13 4 7
14 0 5 9
15 3 6 8
16 1 5
17 2
18 0 2 9
19
20 1
4x-8 x 5x+10
3x+6 10x-20
2/3
What percent is 37 from 65
56.923%
21*65/34 round to the nearest hundredths
40.14
Make a stem and leaf plot with this data:
13, 54, 78, 96, 92, 85, 76, 12, 15, 46, 37, 75, 80, 46, 97, 26, 59, 56, 98, 74, 55, 77, 94, 82, 85, 65, 66, 80, 16, 34, 67, 86, 45, 22, 43, 96, 55, 92, 43, 76, 84, 96, and 1004
1 2 3 5 6
2 2 6
3 4 7
4 3 3 5 6 6
5 4 5 5 6 9
6 5 6 7
7 4 5 6 6 7 8
8 0 0 2 4 5 5 6
9 2 2 4 6 6 6 7 8
...
100 4
70x+20 * 29x+87
34x+17 500x+1500
203x+58
1700x+850
What percent is 1345 from 3
44833.333%
36+87*32/5
592.8
a)(300 points) Make a stem and leaf plot for this data:
76 77 47 47 15 87 86 18 5 42 51 16 77 20 35 65 98 84 68 62 32 83 7 60 67 82 5 93 31 92 84 34 69 12 94 50 12 46 27 17 77 35 75 78 41 67 84 27 66 73 84 99 5 71 17 61 36 14 42 22 27 13 69 74 47 20 2 22 1 92 28 85 94 18 91 40 45 58 81 42 96 16 12 59 13 38 21 79 11 52 55 42 19 20 59 31 36 44 68 80. Don't forget 45 87 95 34 12 79 87 23 57 8 48 70 98 91 64 64 86 9 46 2 8 86 6
b)(200 points) Write all the prime numbers from that data
c)!Extra!(300 points for first correct team) Write all the numbers with exactly 4 factors from that data
a)
0 1 2 2 5 5 5 6 7 8 8 9
1 1 2 2 2 2 3 3 4 5 6 6 7 7 8 8 9
2 0 0 0 1 2 2 3 7 7 7 8
3 1 1 2 4 4 5 5 6 6 8
4 0 1 2 2 2 2 4 5 5 6 6 7 7 7 8
5 0 1 2 5 7 8 9 9
6 0 1 2 4 4 5 6 7 7 8 8 9 9
7 0 1 3 4 5 6 7 7 7 8 9 9
8 0 1 2 3 4 4 4 4 5 6 6 6 7 7 7
9 1 1 2 2 3 4 4 5 6 7 8 8 9
b) 2 5 7 11 13 17 19 23 31 41 47 59 61 67 71 73 79 83 97
c) 6 14 15 21 22 34 35 38 46 51 55 57 58 62 65 69 74 77 82 85 86 87 91 93 94 95