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Jameshappy

  • 2 years ago

So i have a problem and it's about inequality, and it required me to answer it in a complete sentence, little help please :) Problem: Glenda has a $40 gift certificate to a cafe that sells her favorite tuna sandwich for $3.75 after tax. What are the possible number of tuna sandwiches that Glenda can buy with her gift certificate?! And it even said to define a variable, write an inequality then solve. Anyone help me? Thanks :)

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  1. Jusaquikie
    • 2 years ago
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    3.75x<40 x<40/3.75 let me know if you understand, i'll hang out a bit to answer your questions.

  2. Jameshappy
    • 2 years ago
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    Kk so explanation please :) I dont really get it

  3. Jusaquikie
    • 2 years ago
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    is this for algebra?

  4. Jameshappy
    • 2 years ago
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    pre-algerba actually

  5. Jusaquikie
    • 2 years ago
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    do you know how to solve for x? as in 3x=15

  6. Jameshappy
    • 2 years ago
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    you minus it?

  7. Jameshappy
    • 2 years ago
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    -3 on each side?

  8. Jusaquikie
    • 2 years ago
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    ok think of the equal sign as line, and you want to balance each side out

  9. Jusaquikie
    • 2 years ago
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    if you have 3 times some number = 15 then 3 times what would give you 15?

  10. Jameshappy
    • 2 years ago
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    kk keep it going :)

  11. Jusaquikie
    • 2 years ago
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    x is just a number that we don't know what it is yet but we knw that 3*(this number) is 15

  12. Jusaquikie
    • 2 years ago
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    now if we didn't know that 3*5 is 15 we could take the 3 to the other side and then all we have on the 1 side is x=

  13. Jameshappy
    • 2 years ago
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    12?

  14. Jusaquikie
    • 2 years ago
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    that would be right it it were 3+x=15 but if it's 3*x we have to divide 3

  15. Jameshappy
    • 2 years ago
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    oops nvm i get it

  16. Jameshappy
    • 2 years ago
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    ohh i was right nvm again :P

  17. Jusaquikie
    • 2 years ago
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    think of the equal sign like the opposite side, so if you 3*5=15 then 3=15/5

  18. Jusaquikie
    • 2 years ago
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    if it's multiplied on 1 side then to move it you devide the other side by what your moving, if it's just + or - then you change the sign and add or subtract from the other side

  19. Jameshappy
    • 2 years ago
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    so 3x=15 then its gonna be 15+3=x?

  20. Jameshappy
    • 2 years ago
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    can you put it in a simple way ?

  21. Jusaquikie
    • 2 years ago
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    no if x is next to a number without a + or minus between that means x multiplied by the number

  22. Jusaquikie
    • 2 years ago
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    3x means 3 times x

  23. Jameshappy
    • 2 years ago
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    ok gotcha i know that but how to make it balance on either sides?

  24. Jusaquikie
    • 2 years ago
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    just like x/3 is x divided by 3

  25. Jameshappy
    • 2 years ago
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    so x=15?

  26. Jameshappy
    • 2 years ago
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    because 15/3=3

  27. Jusaquikie
    • 2 years ago
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    so if you had \[\frac{ x }{ 3 }=5\] that would mean that you would need to multiply both sides by 3 so you would get \[\frac{ 3x }{ 3 }=5*3\] the 3 and 3 cancle out and your left with x=3*5 or 15

  28. Jusaquikie
    • 2 years ago
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    yes i think your starting to understand a bit

  29. Jusaquikie
    • 2 years ago
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    they are still equal if you do the same thing to both sides so to move 3+x=15 we would subtract 3 from both sides and we get x+12 if we have 3x=15 we have to divide both sides by 3 so we get x=15/3 or 5 if we have x/3= 5 we multiply both sides by 3 and get x= 3*5 or 15

  30. Jameshappy
    • 2 years ago
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    OH i get it so back to the problem 3x=15 would be x=5?

  31. Jusaquikie
    • 2 years ago
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    < and > work the same way if 3+2>4 then 3>4-2

  32. Jameshappy
    • 2 years ago
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    oh ok get it:)

  33. Jusaquikie
    • 2 years ago
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    yes that is correct lets' try this one to be sure you understand \[4x=20\] what is x?

  34. Jameshappy
    • 2 years ago
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    So what about this prbolem? : 2/3 > 1/2 - d/6 / <---- mean " over". Like 2 over 3, 1 over 2 and d over 6

  35. Jusaquikie
    • 2 years ago
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    ok treat the > just like you would = what would you do first?

  36. Jusaquikie
    • 2 years ago
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    you are trying to get d by itself

  37. Jameshappy
    • 2 years ago
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    kick the d out?

  38. Jusaquikie
    • 2 years ago
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    no we want to save that for last wet's get the addition/subtraction out of the way first, \[\frac{ 2 }{3 }>\frac{ 1 }{ 2 }-\frac{ d }{ 6 }\] so if we move 1/2 over it becomes -1/2

  39. Jameshappy
    • 2 years ago
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    how?

  40. Jusaquikie
    • 2 years ago
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    so\[\frac{ 2 }{ 3 }-\frac{ 1 }{ 2 }>\frac{ d }{ 6 }\] now how do we subtract fractions?

  41. Jameshappy
    • 2 years ago
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    uhmm divide it?

  42. Jameshappy
    • 2 years ago
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    OMG im so dump. SOrry im just wasting your time :P

  43. Jusaquikie
    • 2 years ago
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    you need a common denominator, nah it's ok i need a break from my Calculus homework lol

  44. Jameshappy
    • 2 years ago
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    Oh lol you doing a 7th grader math hw

  45. Jusaquikie
    • 2 years ago
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    don't worry about the d/6 right now one piece at a time, math is all in baby steps, when we try to skip stuff we make mistakes so think of it as doing what we know how to make it simpler and right now we can make it simple by subtracting our fractions 2/3-1/2

  46. Jusaquikie
    • 2 years ago
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    yeah some day you can help out a seventh grader lol and it's all be good

  47. Jameshappy
    • 2 years ago
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    haha thanks :) OK back to the prob. so 2/3 - 1/2 gonna be 1?

  48. Jusaquikie
    • 2 years ago
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    so to subtract the denominator has to be the same so we make them the same by finding something in common or cross multiplying so \[\frac{ 2*2 }{ 3*2 } - \frac{ 1*3 }{ 2*3 } = \frac{ 4 }{ 6 }-\frac{ 3 }{6 }\]

  49. Jameshappy
    • 2 years ago
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    oh yeah i forgot im not that good at math :P or sp its gonna be 1/6 ?

  50. Jusaquikie
    • 2 years ago
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    now we have \[\frac{ 1 }{ 6 }>\frac{ d }{6 }\] what would happen if we multiplied both sides by 6?

  51. Jameshappy
    • 2 years ago
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    uhm it still gonna be the same number. But since it lready 6 so i dont think we have to

  52. Jameshappy
    • 2 years ago
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    multiply it right?

  53. Jusaquikie
    • 2 years ago
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    yes so what is 6/6

  54. Jameshappy
    • 2 years ago
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    oh so the answer gonna 6?

  55. Jusaquikie
    • 2 years ago
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    no, if you have a slice of pizza that is 1/6 of the pizza and then you multiply that by 6 what do you have?

  56. Jameshappy
    • 2 years ago
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    |dw:1352952613102:dw|

  57. Jusaquikie
    • 2 years ago
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    the bottom number means that your top number is cut in to that many pieces so 1/6 of a pizza means that you have 6 pieces to make a whole pizza

  58. Jameshappy
    • 2 years ago
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    so the answer is 6/6?

  59. Jusaquikie
    • 2 years ago
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    |dw:1352952779790:dw|

  60. Jusaquikie
    • 2 years ago
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    |dw:1352952857801:dw|

  61. Jameshappy
    • 2 years ago
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    ohhh..... i don't get it.

  62. Jusaquikie
    • 2 years ago
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    how good are you with fractions?

  63. Jusaquikie
    • 2 years ago
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    you might need to review them some

  64. Jusaquikie
    • 2 years ago
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    (1/1) = (2/2)=(3/3)=(4/4)=(5/5)=(6/6) all =1

  65. Jameshappy
    • 2 years ago
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    Like really bad

  66. Jusaquikie
    • 2 years ago
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    6d/6 is the same as (6/6)*d or 1*d or just d

  67. Jameshappy
    • 2 years ago
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    I might need to ask my teacher for that, can you help me with something else instead?

  68. Jusaquikie
    • 2 years ago
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    sure

  69. Jameshappy
    • 2 years ago
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    English?

  70. Jusaquikie
    • 2 years ago
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    lol nah I don't like English as much as math, good luck

  71. Jameshappy
    • 2 years ago
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    oh wow lol fine back to math

  72. Jameshappy
    • 2 years ago
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    lol im done with everything now, im free :)

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