Answer:
1.5
Step-by-step explanation:
6/4=1.5
9/6=1.5
6x + 2x - 1 = 5x + 11
8x - 1 = 5x + 11
- 5x - 5x
3x - 1 = 11
+ 1 + 1
3x = 12
3 3
x = 4

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If you divide 90 to 18, you would get 5. therefore, 5cm is the answer.
Mode = 11
Reason: 11 appeared twice, which is the most frequent number observed in this set of data.