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Math Help - Solve

  1. #1
    Junior Member
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    Solve

    (6.98X6.98-2.02x2.02)/4.96 is

    (a)9
    (b)4.96
    (c)3.72
    (d)6.76

    I got 9 as the answer.But it was given 6.76 is the answer.
    Have I gone wrong some where?
    Last edited by CaptainBlack; August 21st 2008 at 02:22 AM.
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by devi View Post
    (6.98X6.98-2.02x2.02)/4.96 is

    (a)9
    (b)4.96
    (c)3.72
    (d)6.76

    I got 9 as the answer.But it was given 6.76 is the answer.
    Have I gone wrong some where?

    (6.98X6.98-2.02x2.02)/4.96 ~= (7x7-2x2)/5=7
    so the answer is approximatly 7, so 6.76 should be the correct answer if there is one in the list.
    RonL
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  3. #3
    Member
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    Hello,

    Quote Originally Posted by CaptainBlack View Post
    (6.98X6.98-2.02x2.02)/4.96 ~= (7x7-2x2)/5=7
    so the answer is approximatly 7, so 6.76 should be the correct answer if there is one in the list.
    RonL
    Sorry, but (7^2-2^2) /5=9.

    I think 9 is the correct answer:
    6.98^2-2.02^2=(6.98+2.02)(6.98-2.02).
    Use the calculator if you are not sure.

    Bye.
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  4. #4
    Super Member

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    Lexington, MA (USA)
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    Hello, devi!

    \frac{(6.98 \times 6.98)-(2.02\times2.02)}{4.96} \;= . . (a)\;9 \qquad(b)\;4.96\qquad(c)\;3.72\qquad[d)\;6.76

    I got 9 as the answer .
    . . . Right!
    but it was given that 6.76 is the answer .
    . . . They're wrong!

    I have no idea where they got 6.76 !


    \frac{6.98^2 - 2.02^2}{4.96} \:=\:\frac{48.7204 - 4.0804}{4.96} \:=\:\frac{44.64}{4.96} \;=\;9


    \frac{6.98^2 - 2.02^2}{4.96} \:=\:\frac{(6.98 + 2.02)(6.98-2.02)}{4.96} \:=\:\frac{(9)(4.96)}{4.96} \;=\;9


    The answer is: . {\color{blue}(a)\;9}

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  5. #5
    Newbie
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    someone goofed

    The answer has to be around 9

    (7*7-2*2)/5
    (49-4)/5
    (45)/5
    9


    check out my math game site hoodamath.com
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