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MeowLover17

  • one year ago

Celina had a rectangular tablecloth with dimensions x feet and 3 feet. She put lace along 4 feet of the edge of the tablecloth. An expression is shown below: (2x + 6) - 4 Part A: What does the expression represent? (4 points) Part B: What does 2x + 6 represent? (3 points) Part C: What does 2x represent? (3 points)

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  1. Z4K4R1Y4
    • one year ago
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    if you caculating the perimeter of the cloth what would you write?

  2. MeowLover17
    • one year ago
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    Im not sure.

  3. Z4K4R1Y4
    • one year ago
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    |dw:1432939869827:dw| you would write: x + x +3 + 3

  4. MeowLover17
    • one year ago
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    Yes, so (2x+6) represents the entire perimeter?

  5. Z4K4R1Y4
    • one year ago
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    yes

  6. MeowLover17
    • one year ago
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    So does (2x+6)-4 represent the area or...?

  7. Z4K4R1Y4
    • one year ago
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    no. (2x + 6) is the entire perimeter...but 4 ft have lace on them.

  8. Z4K4R1Y4
    • one year ago
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    so what would (2x +6) - 4 be?

  9. MeowLover17
    • one year ago
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    I'm not sure, but i'd have to guess, its the perimeter minus the lace. im not sure what it is otherwise.

  10. MeowLover17
    • one year ago
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    Is there a more detailed way of describing the expression?

  11. Z4K4R1Y4
    • one year ago
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    you're right. it means that's the length of the perimeter that doesn't have lace.

  12. MeowLover17
    • one year ago
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    Okay i see now, So for part A i'd put Part A: The expression (2x+6)-4 represents the part of the perimeter without the lace. Part B: (2x+6) Represents the entire perimeter, x+x being two sides, and 3+3 each being another two sides. Part C: 2x just represents the parallel sides of the rectangle. Also known as the sides opposite to each other, and would basically give its length once x is plugged in.

  13. Z4K4R1Y4
    • one year ago
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    couldn't have put it better myself!!

  14. MeowLover17
    • one year ago
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    Thanks for your help, do you think you can help me with a few more?

  15. Z4K4R1Y4
    • one year ago
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    i can try

  16. MeowLover17
    • one year ago
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    Okay here i go, Veronica teaches French in groups of four students. She rents a room for $200 per month. She charges $45 per hour per student. Veronica teaches seven groups of students, and her net earnings per month are $6,100. Part A: If each student learns French for the same number of hours, write an equation that can be used to calculate the number of hours each student learns French in a month. (5 points) Part B: How many hours did each student learn French each month? Show your work and justify each step of your work. (5 points)

  17. MeowLover17
    • one year ago
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    @Z4K4R1Y4 you still there?

  18. Z4K4R1Y4
    • one year ago
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    yh

  19. Z4K4R1Y4
    • one year ago
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    Sorry, i can't help with this one.

  20. anonymous
    • one year ago
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    28*45*h=6100+200 28 represents the students 45 represents the cost per hour. h represents the # of hours

  21. MeowLover17
    • one year ago
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    Its fine thanks for your help on the other one.

  22. Z4K4R1Y4
    • one year ago
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    np

  23. Z4K4R1Y4
    • one year ago
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    looks like you got help :)

  24. MeowLover17
    • one year ago
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    @LegendarySadist What do i use that for?

  25. anonymous
    • one year ago
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    It is the answer for Part A and the formula you would use to solve Part B

  26. MeowLover17
    • one year ago
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    Okay, so i just solve for h, in 28*48h=6,100+200?

  27. anonymous
    • one year ago
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    Honestly I'm not too sure about the "+200" part since I'm not very well acquainted with what "net earning" is referring to. You may or may not need the +200

  28. MeowLover17
    • one year ago
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    i get 28*48h=6,300 --> 225 divded by 48 recieving 4.6875

  29. MeowLover17
    • one year ago
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    Is that the answer for part b?

  30. anonymous
    • one year ago
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    ok, I confirmed the +200, so yeah that should be the answer.

  31. MeowLover17
    • one year ago
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    but wait would the equation look like this (7)(4)(48)x+200=6,100?

  32. MeowLover17
    • one year ago
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    instead of the +200 being on the other side

  33. anonymous
    • one year ago
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    Wait, wait

  34. MeowLover17
    • one year ago
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    oh nevermind i think you are right

  35. anonymous
    • one year ago
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    I just noticed you made a typo and put 28*48 instead of 28*45

  36. MeowLover17
    • one year ago
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    oops

  37. MeowLover17
    • one year ago
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    so lemme try this again

  38. MeowLover17
    • one year ago
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    28*45*h=6100+200 28 represents the students 45 represents the cost per hour. h represents the # of hours 1260h=6,300 h=5

  39. MeowLover17
    • one year ago
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    Thanks i believe that is correct!

  40. anonymous
    • one year ago
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    Yeah, that looks right to me. Glad i caught that =)

  41. MeowLover17
    • one year ago
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    Yea thanks, do you you think you have time for a few more?

  42. anonymous
    • one year ago
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    I could help with one or two, but no more than that

  43. MeowLover17
    • one year ago
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    Okay sounds good

  44. anonymous
    • one year ago
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    Although it mostly depends on how quickly we can get through them

  45. MeowLover17
    • one year ago
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    Sam is observing the velocity of a car at different times. After two hours, the velocity of the car is 54 km/h. After four hours, the velocity of the car is 58 km/h. Part A: Write an equation in two variables in the standard form that can be used to describe the velocity of the car at different times. Show your work and define the variables used. (5 points) Part B: How can you graph the equation obtained in Part A for the first six hours? (5 points)

  46. MeowLover17
    • one year ago
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    They should be rather fast

  47. MeowLover17
    • one year ago
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    That is the next question

  48. anonymous
    • one year ago
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    Sorry for the delay, but i suppose it would be y=2x+50 wouldn't it? Or just 2x+50

  49. MeowLover17
    • one year ago
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    Im not so sure.

  50. anonymous
    • one year ago
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    Well it satisfies both of them. For x of 2, you would get 54 and an x of 4 would get you 58

  51. MeowLover17
    • one year ago
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    Okay but isnt that in slope intercept form

  52. MeowLover17
    • one year ago
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    So X represents the amount of Hours, and Y represents different times???

  53. anonymous
    • one year ago
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    Slope intercept form is y=mx+b with m being the slope and b being the y-intercept. We have y=2x+52 with 2 being the m and 52 being the b

  54. MeowLover17
    • one year ago
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    How can we put that in standard form??

  55. anonymous
    • one year ago
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    Oh, didn't notice that =(

  56. MeowLover17
    • one year ago
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    does it being in slope intercept form change our entire equation? or can we just switch it to standard? also what do the X and Y variables represent

  57. anonymous
    • one year ago
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    I'd think it would just be -2x+y=50

  58. anonymous
    • one year ago
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    But honestly I'm not sure

  59. MeowLover17
    • one year ago
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    Okay and x represents the velocity while y represents time? in other words we could do -2v+t=50???

  60. anonymous
    • one year ago
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    Standard form is just so useless that i never use it and don't remember how to convert.

  61. MeowLover17
    • one year ago
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    Okay well how would i answer for part A: and B:????

  62. anonymous
    • one year ago
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    Actually yeah, just graphed them and they both fit so -2v+t=50 would be it

  63. MeowLover17
    • one year ago
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    For part A do i put Part A: -2v+t=50 If you input 2 for velocity or 4 both satisfy what is given in the primary equation. v represents the velocity, while t represents time. To solve for v just add it to the other side --> t=+2(2)+50 --> t=54, then you could switch out 4 for v receiving 58. Part B: To graph, just plug in 0 for t and then 6 for t...you get (0,50) and (6,62) Connect those 2 points and you have your graph for the first 6 hours

  64. MeowLover17
    • one year ago
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    So would that be correct? or is my part a or b wrong.

  65. anonymous
    • one year ago
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    Yeah, I'd say that looks good

  66. MeowLover17
    • one year ago
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    Okay thanks do you think you have time for one more??

  67. anonymous
    • one year ago
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    Yeah, I can do one more

  68. anonymous
    • one year ago
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    Gonna be the last tho

  69. MeowLover17
    • one year ago
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    Okay sounds great

  70. MeowLover17
    • one year ago
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    here i go

  71. MeowLover17
    • one year ago
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    The table below shows the outputs y for different inputs x: Input (x) 1 1 3 3 Output (y) 4 2 12 6 Part A: Does the table represent y as a function of x? Justify your answer. (5 points) Part B: The total cost f(x), in dollars, for renting a paddleboat for x hours is shown below: f(x) = 20 + 10x What is the value of f(120), and what does f(120) represent? (5 points)

  72. MeowLover17
    • one year ago
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    I believe for Part a it would be Part A: No the GRAPH does NOT represent a function being there are more than one of the same x variable. But im not sure for part B

  73. MeowLover17
    • one year ago
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    Sorry i meant the table not graph

  74. anonymous
    • one year ago
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    Wait, the input of 1 has two outputs? Definitely not a function there.

  75. MeowLover17
    • one year ago
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    Yea, but i dont understand part B.

  76. anonymous
    • one year ago
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    Just put 120 for x so f(x)=20+10(120)

  77. MeowLover17
    • one year ago
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    Okay and what does that represent???

  78. anonymous
    • one year ago
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    The cost for renting it for 120 hours

  79. MeowLover17
    • one year ago
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    Is that the last one you could help me on? if so your help was appreciated and still is lol.

  80. anonymous
    • one year ago
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    Yeah, I got my own homework to do, I just came here for a little break (a.k.a. procrastination)

  81. MeowLover17
    • one year ago
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    Alright awesome thanks for helping. good luck with your homework.

  82. anonymous
    • one year ago
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    No problem and good luck to you as well =)

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