Answer:
2nd one
Step-by-step explanation:
X is the short piece
(3•x-1)+x=31
4x=31+1
X=32/4=8
Short piece is 8
Long piece is 3•8-1=23
Check 8+23=31 ✔️
If 40% are boy and there are 12 boys
40% of girls would be 12 and another 20% is 6 so
You add 12+12+6=30 students total
Answer:
1205.75999
Step-by-step explanation:
The number would be 18.
Half of 18 = 9
Two thirds of 18 = 12
9 + 12 = 21
