Ahouse was haunted by a combined total of 51 ghosts, goblins, and ghouls. on friday, there were half as many ghosts as there was goblins. on saturday, two-thirds of the ghouls each became a ghost. on sunday, 11 of the ghosts each became a goblin, and the ratio of ghouls to goblins became 1: 3. if no other changes occurred, how many ghosts are there?

Let x represent the numbers of ghosts on Friday

y represent the numbers of ghouls on Friday

z  represent the numbers of goblins on Friday

Their total is 51, so x+y+z= 51

On Friday, there were half as many ghosts as there was goblins

so x = z/2.  

Given: On Saturday, two-thirds of the ghouls each became a ghost.

so the number of ghosts on Saturday is

the number of ghouls is

Given : On Sunday, 11 of the ghosts each became a goblin, and the ratio of ghouls to goblins became 1:3.

On Sunday, the number of ghosts is

the number of ghouls is  1/3y

and the number of goblins is z+11.

Given : The ratio of ghouls to goblins is 1:3, so ...

make a fraction and cross multiply it

y = z+ 11

From the relationship we got

    x +y +z = 51

   y =z+11  

Replace second and third equation in the first equation

multiply the whole equation by 2

z +2z +22 +2z = 102

5z + 22 = 102

Subtract both side by 22

5z= 60 ( divide both sides by 5)

z= 16

Plug in 16 for z

So x= 8

 y =z+11  

so y = 16+11= 27

x=8 , y=27 and z=16

The number of ghosts on Friday = 8

the number of ghosts on Saturday is = 8 + 18 = 26

the number of ghosts on Sunday is

= 8 + 18 -11=15

idk

step-by-step explanation:

use that smart brain

1. 3.4/4

2. 0.8/7

3. 0.5 x 3

4. 0.9 x 6

5. 10.8

6. 2.35

7. 0.567

8. 9.35

9. 0.02

10. 0.06

11. 0.16

12. 0.42

13. 0.63

14. 5.6

15. 8.1

16. 9.9

17. 0.28

18. 0.48

19. 0.27

20. 0.49

21. 0.45

22. 0.72

23. 0.9

24. 0.88

25. 0.75

26. 0.16

27. 0.328

28. 0.495

29. 0.72

30. 1.068