8 liters of club soda was used. The total was 18 liters and one third was orange juice. So you would divide 18 by 3 which equals 6. 6 liters of orange juice + 4 liters of the punch = 10 liters. 18 - 10 = 8.
Letters
If ABC is congruent to DEF
Then angle A = angle D
angle B = angle E
angle C = angle F
Sides:
AB = DE
BC = EF
AC = DF
No.
0.75 and 3/4 are equivalent though.