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24 July, 13:44

Ella simplifies (3 b + 4 r) + (negative 2 b minus r) and says the result is b Plus 5r. What error did Ella make? Ella incorrectly combined the b coefficients. The correctly simplified expression is 5 b + 5 r. Ella incorrectly combined the b coefficients. The correctly simplified expression is Negative b + 5 r. Ella incorrectly combined the r coefficients. The correctly simplified expression is b - 5r. Ella incorrectly combined the r coefficients. The correctly simplified expression is b Plus 3r.

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  1. 24 July, 15:22
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    Ella incorrectly combined the r coefficients. The correctly simplified expression is b Plus 3r.

    Step-by-step explanation:

    (3b+4r) + (-2b-r)

    Open the bracket

    =3b+4r-2b-r

    Combine the like coefficient

    =3b-2b+4r-r

    =b+3r

    Ella incorrectly combined the r coefficients. The correctly simplified expression is b Plus 3r.
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