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anonymous

  • one year ago

The equation below shows the area of a trapezoid, A, with a height of 9 cm, and one base 35 cm. : A = 9 over 2(b + 35) Which of the following formulas correctly solves for the other base, b? b = 2A over 9 + 35 b = 2 multiplied by A over 9 - 35 b = 2 multiplied by A plus 35, all over 9 b = 2 multiplied by A minus 35, all over 9

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  1. anonymous
    • one year ago
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    @zzr0ck3r

  2. anonymous
    • one year ago
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    can you help

  3. anonymous
    • one year ago
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    @wio

  4. zzr0ck3r
    • one year ago
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    \(A=\dfrac{9}{2(b+35)}\) ?

  5. anonymous
    • one year ago
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    A=9/2 (b+35)

  6. zzr0ck3r
    • one year ago
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    \[A=\dfrac{9}{2}(b+35)\]?

  7. anonymous
    • one year ago
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    Yes

  8. zzr0ck3r
    • one year ago
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    multipply both sides by \(\dfrac{2}{9}\) and what do you have?

  9. zzr0ck3r
    • one year ago
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    multiply*

  10. anonymous
    • one year ago
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    9/2b+ 315/1

  11. anonymous
    • one year ago
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    2/9b

  12. zzr0ck3r
    • one year ago
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    \((\dfrac{2}{9})A=(\dfrac{\cancel{2}}{\cancel{9}})\dfrac{\cancel{9}}{\cancel{2}}(b+35)\\\dfrac{2}{9}A=b+35\)

  13. zzr0ck3r
    • one year ago
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    you with me?

  14. anonymous
    • one year ago
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    Yes

  15. zzr0ck3r
    • one year ago
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    subtract 35 from both sides

  16. anonymous
    • one year ago
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    @skullpatrol

  17. anonymous
    • one year ago
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    @wio

  18. anonymous
    • one year ago
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    @UsukiDoll

  19. anonymous
    • one year ago
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    @freckles

  20. anonymous
    • one year ago
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    Hello

  21. UsukiDoll
    • one year ago
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    so leaving off with what zzrocker said we are solving for b and the last step he did was \[(\dfrac{2}{9})A=(\dfrac{\cancel{2}}{\cancel{9}})\dfrac{\cancel{9}}{\cancel{2}}(b+35)\\\dfrac{2}{9}A=b+35 \]

  22. UsukiDoll
    • one year ago
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    there's not that much left to do with this problem... if we want b by itself, what do we have to do?

  23. anonymous
    • one year ago
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    -35

  24. anonymous
    • one year ago
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    from each side

  25. UsukiDoll
    • one year ago
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    yes

  26. UsukiDoll
    • one year ago
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    \[\frac{2}{9}A - 35 = b\] that's it :)

  27. UsukiDoll
    • one year ago
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    you're looking for this selection right? b = 2 multiplied by A over 9 - 35

  28. anonymous
    • one year ago
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    thanks @UsukiDoll

  29. UsukiDoll
    • one year ago
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    can I get a medal? :)

  30. anonymous
    • one year ago
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    i just did

  31. UsukiDoll
    • one year ago
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    thank you :)

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