## alahrichi1 2 years ago FAN AND MEDAL AWARDED Evaluate the expression, using the given value of the variable. z ÷ 3 – 5z + 4(z – 2) when z = 12 A. –98 B. –96 C. –16 D. –14

1. AravindG

Ok use BODMAS rule and substitute x=12 in the equation

2. AravindG

@alahrichi1

3. alahrichi1

I did that and got -5

4. AravindG

try again?

5. AravindG

can u please show ur step then i can know where you are making mistake

6. AravindG

@alahrichi1 ?

7. alahrichi1

=12+3-5*12+4(12-2) =12+3-5*12+4*10 =12+3-60+4*10 =12+3-60+40 =15-100 =-85

8. AravindG

ok ur first step is right

9. AravindG

you considered the brackets and got 10

10. alahrichi1

yes..

11. AravindG

and note it is z/3 not z+3 !!

12. alahrichi1

OMG!!!!!!!!!!!! thanks sooo much!! thats where my mistake was!!!

13. AravindG

=12/3-5*12+4*10 =12/3-5*12+40 now do division

14. AravindG

yw :)

15. alahrichi1

ok 1 sec

16. alahrichi1

-96

17. AravindG

try again?

18. AravindG

show me ur step after =12/3-5*12+4*10 =12/3-5*12+40

19. alahrichi1

=4-60+40 =-96 :D

20. AravindG

-60+40=??

21. AravindG

reply pls i gotta sleep after finishing this !!

22. AravindG

@alahrichi1 .......

23. alahrichi1

-20

24. AravindG

-20+4=?

25. alahrichi1

no bro, not -60+40 its 4 minus 60

26. AravindG

both are same :)

27. AravindG

subtraction is actually a form of addition only :)

28. AravindG

whatevr way you do the answer will be same

29. AravindG

4-60=?

30. AravindG

31. alahrichi1

-56

32. AravindG

-56+40 =?

33. alahrichi1

-16

34. AravindG

:D you done it !!!

35. AravindG

if you did other way also you will get -16 see =4-60+40 =4-20 =-16

36. AravindG

beauty of mathematics !!

37. alahrichi1

omg dude u are a legend

38. AravindG

:D thanks ..nw i can sleep :)

39. alahrichi1

good nite

40. AravindG

thanks hav good day/night :)

41. alahrichi1

u too