## anonymous one year ago Can someone check my work plz? 2/3n=8 n=____ I get 9 Is that right? IS the correct answer n=12???

1. anonymous

how did u get that ?

2. anonymous

tbh I took 2/3 and multiplied to get a whole # 2/383=6/3 which is the whole #2

3. anonymous

hold on ...think I goofed on it

4. anonymous

waiiit a min i am confused see the easiest method

5. anonymous

so frustrated.... now i can not duplicate the problem... ugh

6. anonymous

2 = 3n* 8 do it like this

7. anonymous

2 = 24n

8. anonymous

so n 2/24

9. anonymous

n = 1 /12

10. anonymous

i understand the problem as 2/3 multiplied by N gives you the answer of 8 therefor 2/3 goes into 8 ____ times the ____ being what N= right?

11. anonymous

nooo dont confuse it take it simpleeee

12. anonymous

2/3n = 8$\frac{ 2 }{ 3n } =8$

13. anonymous

therefore 2 = 3n * 8

14. anonymous

2 = 24n

15. anonymous

24n = 2

16. anonymous

n = 2/24

17. anonymous

n = 1 /12

18. anonymous

thats it

19. anonymous

i just got n=12 using the http://www.tiger-algebra.com/drill/2/3n=8/

20. anonymous

Is it 2/3n or (2/3)*n?

21. anonymous

no its -8 and in ur equation it is =8

22. anonymous

it says solve. 2over 3n=8 n=___ so 2/3n=8 n=__

23. anonymous

So then Smitha is right

24. anonymous

idk.... I went to http://www.tiger-algebra.com/ and used their system and it says only one answer can be found and that is n=12. looking at how it is worked out it appears to be correct but now i am second guessing things. I only have one try with this test so I can not afford to fail it :/

25. anonymous

If I could suggest something real quick, your equation is 2/3n = 8. If you have a calculator on you you could find that 2/3 is .6 (repeated). So .6n(repeated) = 8. Then you have to divide the .6n (repeated) by .6 to get "n" by itself. And the 8 by the .6 as well. The answer I got was 12. Sorry if this didn't help.

26. anonymous

Thank you. It helps and that is the same principle steps I was doing

27. anonymous

Ok, and no problem :D This used to be my favorite type of math.

28. anonymous

can you maybe help me with a few more , if you have time?

29. anonymous

Sure. Just give me a minute or two with my responses :P

30. anonymous

after an hour and a half i am only on #5...lol...

31. anonymous

There is a difference between 2/3n and and (2/3)*n

32. anonymous

|dw:1432914834349:dw|

33. anonymous

Yes. I believe it is the second one, just wrote out differently.

34. anonymous

You clearly have misinterpreted the question

35. anonymous

@LiamR Doesn't 2 over 3n mean the first one

36. anonymous

Based off of what @TTinSC said I inferred it was the second.

37. anonymous

@TTinSC how was it written on your test.

38. anonymous

If it is really 2 over 3n then @abdul_shabeer is absolutely right.

39. anonymous

|dw:1432915004134:dw| solve for n

40. anonymous

@abdul_shabeer ^

41. anonymous

@LiamR is right, then

42. anonymous

http://www.tiger-algebra.com/drill/2/3n=8/ this is the site i use to answer this maybe you can go there and see if it is correct... so confused now:[

43. anonymous

You had a very good point @abdul_shabeer , TTinSC make sure you pay attention to the equation setup in-case you have these in the future.

44. anonymous

When written like that @TTinSC answer 12 is correct.

45. anonymous

that is the actual page i entered the problem on

46. anonymous

ok... here comes the next one

47. anonymous

|dw:1432915347174:dw|

48. anonymous

so that would be 7z-1 divided by2=3z-2....correct?

49. anonymous

Yes. I believe so. Any idea on how to get started? If not let me know.

50. anonymous

brain dead atm ...lol...trying to remember the steps

51. anonymous

Ok. So what you want to try and work towards is getting "z" to be alone on one side. Before you can do that though, you have to get rid of the 2 in the denominator on the left side of the equation. Do you know how to do that?

52. anonymous

If not that's ok

53. anonymous

so it should be 7z=7z/1=7z*2 /2 or to state it 7zequals 7z over1( or divided by1) equals 7z multiplied by2 over(or divided by)2

54. anonymous

-0.375?

55. anonymous

Not quite sure how you got that. There is an easier way to do it. Since the left equation is being divided by 2, to get rid of the 2, all you have to do is multiply all of the "groupings" on the right side by two. So instead of the equation [ 7z - 1 / 2 = 3z - 2 ] it would be 7z - 1 = 6z - 4 ]. See what I did. |dw:1432916166225:dw|

56. anonymous

Sorry for the terrible drawing. Not good with the tool xD.

57. anonymous

z= -3/8 = -0.375

58. anonymous

LMAO.... ikr..same here and i can not remember how to screen shot...lol

59. anonymous

Basically what I did was multiplied the left side by 2 to get rid of the 2, and the right side by 2 to balance the equation.

60. anonymous

So now that you have the equation 7z -1 = 6z - 4, do you know how to simplify it?

61. anonymous

@TTinSC do you understand what I did? Or are you confused

62. anonymous

i think after simplifying it is the z=-3/8 as a fraction or -0.375 as a #

63. anonymous

I am not sure how you got that. Are you following the steps I am showing?

64. anonymous

or at least i think so

65. anonymous

soooo confused ... i was out sick for several weeks and i am now trying to basically cram all of this in and i do believe my brain is on overload... i swear there is smoke coming out of my ears...lol

66. anonymous

That is not what I got. The last step is super easy. When you have the equation 7z -1 = 6z - 4, what I would do is add a 1 to both sides. So now your equation is 7z = 6z - 3. Then I would subtract the 6z from both sides. So z = -3. Is this a multiply choice thing or short answer?

67. anonymous

|dw:1432916734196:dw||dw:1432916755139:dw||dw:1432916776530:dw|

68. anonymous

ok... not 100% on understanding... i think i keep skipping a step... but looking at what you did i think i understand now :)

69. anonymous

so z=-3

70. anonymous

Ok. If you don't please let me know. I had missed a lot of days too and it always came back to kill me on tests. All I did was subtract, divide, and add values from each side (making sure what I did to one side I did to the other so the equation stayed balanced) and got "z" alone

71. anonymous

And yes z = -3 based on my answer

72. anonymous

u in k12?

73. anonymous

No. Why?

74. anonymous

i got sick missed several weeks came back got locked out bc study island was behind ..bc i had been sick ...by the time i got the ols back open i had missed from the begining of Nov. tho the first of march.... it is just overwhelming me to try and catch up... got all other subjects caught up , but only have to do the assesments for math... only have till next Thursday... current math grde...36%... i have always been on the honor roll and the superintendents list but this year i am tanking and so frustrated at this point that i am ready to cry...

75. anonymous

Woah. Well then... all I can say is I wish you the best of luck and hang in there. It should get better.

76. anonymous

i am working on the first semester exam atm... and you only get 1 chance. i have to get atleast an 80 on it. most of the tests give you 3 tries to get the highest grade... not this tho

77. anonymous

Yea, I know the feeling. I am in a virtual program as well and it gives the same situation.

78. anonymous

ok... this one is a word problem... i think i have the answer

79. anonymous

when 8 subtracted from Ollie's age result is same as subtracting 16 from 3 times Ollie's age how old is Ollie

80. anonymous

I have to take care of something real quick I'll be back in a minute.

81. anonymous

if Ollie =x x-8=y y=3x-16 x-8=3x-16 -8=2x-16 8=2x 4=x answer is 4 yrs. old

82. anonymous

x-8=3x-16 -8=2x-16 8=2x 4=x

83. anonymous

lol

84. anonymous

tyvm

85. anonymous

got some more... can u help?

86. anonymous

sure =)

87. anonymous

What is the standard form of the equation? 5x = 4y – 3 A. 5x – 4y + 3 = 0 B. 5x = 4y – 3 C. 5x + 3 = 4y D. 5x – 4y = –3

88. anonymous

not so great with these

89. anonymous

subtract 4y and add 3 to both sides

90. anonymous

that would be setting y to 0 i cant remember if thats standard or not but its setting y to 0

91. anonymous

not the slightest idea trying to search thru book for the process

92. anonymous

93. anonymous

Standard form is A + B = C. I would do a quick google search for "standard form" but I believe the answer is D

94. anonymous

Ah I remember now. Standard form is when the equation goes from highest numbers (with variables) to lowest numbers, then to numbers without variables. So basically highest to lowest numbers with variables, then if no variables highest to lowest. |dw:1432918595652:dw| Above is an example with random numbers and variables

95. anonymous

ur right Liam... it is D

96. anonymous

What is the slope of the line 4y – 6x + 12 = 0 in simplest form?

97. anonymous

i do not get the slope thing at all.... spent 6 hours yesterday trying to figure it out...

98. anonymous

Do you know what slope intercept forms is. It is y = mx + b. So what you are trying to do is get the 4y alone on one side. (kinda like we did earlier) any ideas on what to move first?

99. anonymous

no... somehow i got a few right yesterday but i can not duplicate it...

100. anonymous

give me a sec... gonna try the formula i used yesterday just got to find it in my notebook...

101. anonymous

i subtract 12 from both sides and add 6x to both sides and get 4y=6x-12 then divide by 4 on each side right?

102. anonymous

Ok. What i would do first is take the equation 4y - 6x + 12 = 0 and add a 6x to both sides. |dw:1432918942424:dw| Now you have 4y + 12 = 6x. I would subract a 12 from both sides. |dw:1432919001252:dw| Now you have 4y = 6x + 12. If you notice it looks like Y = mx + b. Now, y is still not alone because of the 4, so you have to divide every term by 4. Look at this picture for help because this is tricky. |dw:1432919070957:dw| So now you have y = 6/4x + 12 (y = 1.5x + 12). So the slope in simplest form would be 6/4 or 1.5

103. anonymous

104. anonymous

|dw:1432919197749:dw| the "m" in the equation always equals the slope

105. anonymous

simplified ...right??

106. anonymous

and yes 3/2. I didn't simplify the 6/4 :/

107. anonymous

What is the y-intercept of the line represented by the equation? y = 7x + 2

108. anonymous

I was going to say this beofe but didn't. In the equation y = mx + b (or your equation y = 7x +2) the m (or 7) always equals the slope and the b (or 2) always equals the y intercept

109. anonymous

before*

110. anonymous

ok... so in the new problem will that help me solve for the y intercept

111. anonymous

Yes

112. anonymous

|dw:1432919504898:dw| @TTinSC what did I say the "b" was equal to?

113. anonymous

so the answer would be 2... bc it is clearly stated in the equation...right... i think

114. anonymous

Yes

115. anonymous

Easiest question ever right xD

116. anonymous

sweet... ha i get that really good now ...lol

117. anonymous

Haha. Anymore?

118. anonymous

yep

119. anonymous

so very much h8 these... y did they have to take the fun out of graphs lol

120. anonymous

Can't open that file

121. anonymous

ok... i used apache open office... it should work with windows ms office... let me try something else... it is a graph

122. anonymous

sorry wifi dropped ...

123. anonymous

What is the equation of the line expressed in slope-intercept form? y = –3x – 1 y = 3x + 2 y = 2x + 3 y = –2x + 3