Answer:
C. 48.
Step-by-step explanation:
If the mean is 12, then 12 must be 2x, 3x, 4x, and 3x divided by 4.
--> 
--> 
--> 
--> x=4
Add: 2x+3x+4x+3x=8+12+16+12=48
Step-by-step explanation:
3(7x-4) <_ 9
or, (7x-4)<_3
or, (7x)<_3+4
or,x<_7/7
or, x<_1
Answer: 0.3
Step-by-step explanation:
Answer:
20
Step-by-step explanation
We need to find the multiples of 10 and 20 (multiples of 10 = 10, 20, 30, 40; multiples of 20 = 20, 40, 60, 80) and choose the smallest multiple that is exactly divisible by 10 and 20, i.e., 20.