7(a)Algebraic Expressions FormulaeMedium2 marksWrite down an expression for the total number of marbles that Krish and Jo have. Give your answer in its simplest form.Total marbles, simplest formA5x+5B7x+13C5x+12D13xE5x+13F6x+13G4x+13Grade answerGrading criteria
7(b)Algebraic Expressions FormulaeMedium2 marksKrish has more marbles than Jo. Write down an expression for how many more marbles Krish has than Jo. Give your answer in its simplest form.Difference in marbles, simplest formA6x−5B7x−4C7x−5D8x−5E5x−5F7x+5G7x−13Grade answerGrading criteria