9a)
4x - 2 + 30 = 68
4x + 28 = 68
4x = 40
x = 10
9b)
y = 180 -68
y= 112
Answer:
Try as percentages so
7) 37.5%
8) 50%
9) 12.5%
10) 62.5%
11) 87.5%
12) 50%
13) 62.5%
14) 37.5%
15) 100%
Step-by-step explanation:
So you just take 100% - 29% = 71%
So 71% of the students did not wear jeans
Step-by-step explanation:

Answer:
648 cubic centimeters
Step-by-step explanation:
6×9×12=648