Question

Solve Proportions
EXAMPLE = 10
ax 1.5=1 x 30
1.5a/1.5 = 30/1.5
a=20
Simplify. Divide both sides by 1.5.

Solve for x.
1.) x/16 = 45/40 —
2.) x/5 = ¼ —
3.) 2.5/10 = x/50 — 4.) x/6 = 2/9 —
Find the Range
EXAMPLE
Order the data from least to greatest
19, 19, 21, 21, 26, 26, 29, 29, 30, 30, 32, 32
range = 32-19
= 13
The range is the difference between the greatest and the least data items.
Find the range of the data.
5. 52, 48, 57, 47, 49, 60, 59,51 _
6. 5,9,13,6,4,5,8,12, 12,6
7. 97, 106, 99, 97, 115,95, 108, 100
8. 27, 13, 35, 19, 71, 12, 66, 47, 39_
Find the Mean
EXAMPLE 21, 15, 26, 19, 25, 14
mean - 21+ 15 + 26 + 19 + 25 + 14
The mean is the sum of the data items divided by the number of items.
120
= 20
Find the mean of each set of data.
9. 3,5,7,3,6, 4, 8, 6, 9,5
10. 8.1, 9.4, 11.3, 6.7,6.2, 7.5

Answer 1

1) x = 18

2) x = 5/4

3) x = 12.5

4) x = 4/3

5) range = 13

6) range = 8

7) range = 18

8) range = 59

9) mean = 5.6

10) mean = 8.2

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