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Alex_Mattucci

  • one year ago

Which expression is equivalent to the area of metal sheet required to make this square-shaped traffic sign? One side of the sign is 4x+3. a. 16x2 + 12x + 9 b. 16x2 + 24x + 9 c. 8x2 + 9 d. 8x2 + 6

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  1. anonymous
    • one year ago
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    what do you know about the sides of a square?

  2. Alex_Mattucci
    • one year ago
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    what do u mean?

  3. anonymous
    • one year ago
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    just what i asked... you know what a sqaure is, right? what can you tell me about its sides?

  4. Alex_Mattucci
    • one year ago
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    it has four sides, each are equal in length

  5. anonymous
    • one year ago
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    excellent! and what about the area of a square?

  6. Alex_Mattucci
    • one year ago
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    length times width

  7. Alex_Mattucci
    • one year ago
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    ohhhhh

  8. anonymous
    • one year ago
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    but for a square, length and width are...?

  9. Alex_Mattucci
    • one year ago
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    they are the same

  10. anonymous
    • one year ago
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    man, you are on it!!!

  11. Alex_Mattucci
    • one year ago
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    so it would be (4x+3)(4x+3)

  12. anonymous
    • one year ago
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    excellent!!! and what do you get when you multiply that out?

  13. Alex_Mattucci
    • one year ago
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    c. 8x2 + 9

  14. anonymous
    • one year ago
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    nope

  15. anonymous
    • one year ago
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    do you know the distributive property?

  16. Alex_Mattucci
    • one year ago
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    sorry, i coppied and pasted the wrong one from above lol...

  17. anonymous
    • one year ago
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    a(b+c) = ab + ac

  18. Alex_Mattucci
    • one year ago
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    The right one is b. 16x2 + 24x + 9

  19. anonymous
    • one year ago
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    however, if a is a binomial (two terms) also, it goes like this... suppose a = f+g then we get ab + ac = (f+g)b + (f+g) c and using distribution again we get... fb + gb + fc + gc

  20. anonymous
    • one year ago
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    there you go... you know how to multiply those out, right? you're not just guessing...

  21. Alex_Mattucci
    • one year ago
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    yeah i do

  22. anonymous
    • one year ago
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    awesome! hey, just a hint... whenever you can draw a picture to represent what is going on in a problem, do so. make it sufficicently large and put all available info on it. we humans are visual creatures!

  23. Alex_Mattucci
    • one year ago
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    alright

  24. Alex_Mattucci
    • one year ago
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    ty so much

  25. anonymous
    • one year ago
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    good luck and have a great day!

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