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Math Help - Can Anyone Help Please (URGENT)

  1. #1
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    Can Anyone Help Please (URGENT) [5 Quest.]

    Can anyone help me with any of these questions? Thanks alot.


    1. Solve by using the quadratic formula.
    5p^2=-18p-9

    2. Solve for x by using the quadratic formula.
    9x^2-24x+16=0

    3. Simplify
    (SQRT)63 times (SQRT)112
    IS THE ANSWER: 84 ?

    4. Multiply and simplify by factoring.
    5(SQRT)6 times 7(SQRT)15
    IS THE ANSWER: 105(SQRT)10 ?
    Last edited by mikejones; November 26th 2008 at 05:12 AM.
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  2. #2
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    Re >

    Quote Originally Posted by mikejones View Post
    Can anyone help me with any of these questions? Thanks alot.


    1. Given the function f(x)=|x+4|, find the following.
    f(-5)

    2. Tyler is flying a kite on 500 feet of string. How high is it abiove the ground if the horizontal distance between Tyler and the kite is 300 feet?
    Use the quadratic formula to solve the equation.
    5x^2-7x-3=0

    3. Solve by using the quadratic formula.
    5p^2=-18p-9

    4. Solve for x by using the quadratic formula.
    9x^2-24x+16=0

    5. Simplify
    (SQRT)63 times (SQRT)112

    6. Multiply and simplify by factoring.
    5(SQRT)6 times 7(SQRT)15

    (1)f(x)=|x+4|, f(-5) = | -5+4 | = 1

    (2)Use phythagoras theorem

    (3) and (4) use the quadratic formula

    p=(-b +/- SQRT(b^2 - 4 ac ) )/ 2a
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  3. #3
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    Quote Originally Posted by mathaddict View Post
    (1)f(x)=|x+4|, f(-5) = | -5+4 | = 1

    (2)Use phythagoras theorem

    (3) and (4) use the quadratic formula

    p=(-b +/- SQRT(b^2 - 4 ac ) )/ 2a

    (5)5(SQRT)6 times 7(SQRT)15 = SQRT 25 ( SQRT 6 ) (SQRT 49 )(SQRT 25 )
    note that SQRT a times SQRT a = SQRT a^2
    Wouldn't #1 be -1? (-5+4=-1 right?)
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  4. #4
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    Re :

    there is a modulus in this question , everything that comes out from it would be positive .
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  5. #5
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    Quote Originally Posted by mathaddict View Post
    there is a modulus in this question , everything that comes out from it would be positive .
    Oh ok thanks dude..Got it now...are these right..

    3. Simplify
    (SQRT)63 times (SQRT)112
    IS THE ANSWER: 84 ?

    4. Multiply and simplify by factoring.
    5(SQRT)6 times 7(SQRT)15
    IS THE ANSWER: 105(SQRT)10 ?
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  6. #6
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    Quote Originally Posted by mikejones View Post
    Oh ok thanks dude..Got it now...are these right..

    3. Simplify
    (SQRT)63 times (SQRT)112
    IS THE ANSWER: 84 ?

    4. Multiply and simplify by factoring.
    5(SQRT)6 times 7(SQRT)15
    IS THE ANSWER: 105(SQRT)10 ?
    (3) excellent
    (4) 35 ( SQRT 90 ) = 35 SQRT( 10 x 9 ) , so u r right ...
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