jewelgurl I need Math help really bad one year ago one year ago

1. xBabyGirlx

what do you need help with?

2. jewelgurl

|dw:1357582500584:dw|

3. jewelgurl

I have no idea how to do this stuff

4. jewelgurl

|dw:1357582661052:dw|

5. jewelgurl

Can somebody please explain these to me and how to do them?

6. BluFoot

First turn the mixed fractions into improper fractions. Do you know how to do that?

7. BluFoot

Let's start with just the first one: m - 3 + 2/5 = 4 + 1/4

8. jewelgurl

3*5+2? to turn it into an improper fraction?

9. jewelgurl

and 4*1+4

10. BluFoot

yeah so what do you get?

11. jewelgurl

17 and 8

12. BluFoot

Oh sorry your second one should have 4*4 + 1. so 17 also. So now your equation looks like: m - 17/5 = 17/4

13. jewelgurl

oh okay whoops read it wrong

14. BluFoot

Now you want to isolate m. So add 17/5 on both sides.|dw:1357583215980:dw|

15. jewelgurl

So how do both denominators get 5?

16. BluFoot

You can't. You want to do 17/4 + 17/5. So you need to find a common denominator! What's the lowest common multiple of 4 and 5?

17. jewelgurl

oh okay that would be 5?

18. BluFoot

No, 5 is not a multiple of 4

19. jewelgurl

so it would be 20?

20. BluFoot

Yes good! So you want make the denominators of each fraction 20

21. jewelgurl

Like this?|dw:1357583588683:dw|

22. BluFoot

No, because you need to correct the numerators also. I''ll do the first fraction for you. 17/4 = ?/20 You're multiplying bottom by 5, so you need to multiply top by 5 also. Therefore 17/4 = 17*5/20 17/4 = 85/20

23. BluFoot

Do the same for 17/5 17/5 = ? / 20

24. jewelgurl

so it would be 17/5 = 17*5/20 If that is correct then 85/20?

25. BluFoot

No because this time you're multiplying by 4. To get from 5 to 20 you need to multiply by 4

26. BluFoot

|dw:1357583956637:dw|

27. jewelgurl

oh okay so that would be 68/20

28. BluFoot

Good. So now you have m = 68/20 + 85/20 Almost there!

29. jewelgurl

okay so now that the denominators are the same so I add them??

30. BluFoot

yes

31. jewelgurl

okay so now I have m=153/20 so now do i turn it back into a mixed number?

32. BluFoot

Do you have to? I would leave it as an improper fraction

33. jewelgurl

I do. So to turn it back would I dived the numerator by the denominator?

34. jewelgurl

when i do that I get 7.65

35. BluFoot

Divide the numerator by the denominator and keep the remainder. So here you get 153/20 = 7 with 13 remainder = 7 13/20

36. jewelgurl

oh okay, so can I do the second one and you can tell me if I am correct?

37. jewelgurl

|dw:1357585046976:dw|Correct??

38. jewelgurl

then this right?|dw:1357585367758:dw|

39. BluFoot

Sorry I was AFK. Very close!!! Except it should be minus this time because you're taking away 20/9 from the left side: |dw:1357586173404:dw|

40. jewelgurl

Okay so you reverse it, so addition is subtraction and vice versa?

41. jewelgurl

y=32

42. jewelgurl

32/9 = 3 5/9

43. BluFoot

Sorry a bit late but yes that's right!