exam Maths Puzzle Numerical Ability

simplify this expression:
4a+6b+a

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exam Other Question

sally has f bags of lego in each are 22 blocks .sam has 9 lego blocks spare so gives them to sally.expression for numer of blocks sally has.sally has 119 blocks.form an equation solve the equaation find the number of lego bags sally has a railroad toy is laid out in circular form. what diameter should be used if the track is to change direction by 32 degrees in a distance of 50cm?

my answer is 179.14 cm. am i correct?