Answer:
x=4
Step-by-step explanation:
3x + 6 = 18
3x = 18 - 6 = 12
x = 4
6 2/7is rational
-19is rational but next I dont know
7/15
0.4 6 = 0 . 6 - 0.2
0.46 = 6/9 ⋅ 0.9 - 0.2
0.46 = 6/9 - 1/5
0.46 = 2/3 - 1/5
0.46 = 10/15 - 3/15
0.46 = 7/15
Note that 7 and 15 have no common factors larger than 1 , so this is in simplest terms.
This is found by the volume of a cone formula
Where b is the base and h is the height
