Which best represents a reaction mechanism? ОА-А O A+B reactants O A+B – products O A+ A- A+ A

Which best represents a reaction mechanism?
ОА-А
O A+B reactants
O A+B - products
O A+ A- A+ A

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  1. linda: 3 ; laura: 15

    step-by-step explanation:

    note that linda + laura's age is 18, and that linda is 12 years younger than her sister.

    let "linda" = x , "laura" = y:

    x + y = 18

    x = y - 12

    first, plug in y - 12 for x in the first equation:

    (y - 12) + y = 18

    simplify.

    2y - 12 = 18

    isolate the variable (y). note the equal sign, what you do to one side, you do to the other. do the opposite of pemdas. first add, then divide.

    2y - 12 (+12) = 18 (+12)

    2y = 18 + 12

    2y = 30

    (2y)/2 = (30)/2

    y = 30/2

    y = 15

    next, plug in 15 for y in the second equation (the other equation would work too).

    x = y - 12

    x = (15) - 12

    x = 3

    linda's age is 3, laura's age is 15.

    ~

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