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pandaecat

  • one year ago

Check my answer please! Alexei wants to hang a mirror in his boat, and put a frame around it. The mirror and frame must have an area of 19.25 square feet. The mirror is 3 feet wide and 5 feet long. Which quadratic equation can be used to determine the thickness of the frame, x? My answer is 4x^2+16x+15.

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  1. pandaecat
    • one year ago
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    The choices are 2x^2 + 8x − 19.25 = 0 3x^2 + 5x − 19.25 = 0 4x^2 + 16x − 4.25 = 0 4x^2 + 16x + 15 = 0

  2. triciaal
    • one year ago
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    |dw:1440442414237:dw|

  3. pandaecat
    • one year ago
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    OK ty!

  4. triciaal
    • one year ago
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    wait

  5. pandaecat
    • one year ago
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    Hmm?

  6. triciaal
    • one year ago
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    |dw:1440442684697:dw|

  7. pandaecat
    • one year ago
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    I don't really get it...

  8. triciaal
    • one year ago
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    the area is 4x^2 + 16x + 15 is the area of mirror + frame = 19.25 the frame is total area - mirror so minus 15 = 4.25

  9. triciaal
    • one year ago
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    quadratic for frame 4x^2 + 16x - 4.25 = 0

  10. triciaal
    • one year ago
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    sorry for the time lapse my sister called long distance don't multitask well

  11. triciaal
    • one year ago
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    do you have any questions?

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