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TestTakingLifesaver

  • one year ago

Which expression represents the area of the triangle? base=2x+12, height x+7 A) 3x + 19 B) 3x2 + 84 C) x2 + 13x + 42 D) 2x2 + 26x + 84

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  1. tcarroll010
    • one year ago
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    A = bh/2 So, you would multiply the 2 expression for "b" and "h" (that are in "x") and divide by "2". Hint: It's easier to divide the "base" (or b) expression first by "2" and then simply multiply that by the expression for "h".

  2. tcarroll010
    • one year ago
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    So, what is the expression for for the base divided by "2"?

  3. TestTakingLifesaver
    • one year ago
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    1x+6

  4. tcarroll010
    • one year ago
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    Very good. So, now, all you have to do is multiply your answer by "x + 7" (x + 6)(x + 7) = ?

  5. tcarroll010
    • one year ago
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    Are you stuck?

  6. TestTakingLifesaver
    • one year ago
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    46

  7. tcarroll010
    • one year ago
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    When you have an expression like: (x + a)(x + b) It is: x(x + b) + a(x + b) = x^2 + bx + ax + ab = x^2 + (a + b)x + ab So, just substitute a = 6 and b = 7 in that last equation

  8. TestTakingLifesaver
    • one year ago
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    thank you this is so confusing

  9. tcarroll010
    • one year ago
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    Math can be, but if you take it step by step, it won't trick you. IMath is like a friend that speaks a foreign language.

  10. TestTakingLifesaver
    • one year ago
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    i'll practice and see if i can learn the langage

  11. tcarroll010
    • one year ago
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    That's a great attitude! You'll succeed if you stick with it. And you might want to go over that equality expansion a couple of times because it could clear things up for you.

  12. TestTakingLifesaver
    • one year ago
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    ok thanks so much

  13. tcarroll010
    • one year ago
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    You're very welcome and nice working with you!

  14. tcarroll010
    • one year ago
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    And thx for the recognition! @TestTakingLifesaver Good luck in all of your studies.

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