exam Maths Puzzle Numerical Ability

remove parenthesis and solve: show steps please

5(x+2)+3(2x+1)-(x-5)=10

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exam Other Question

Find the radius of the base of each Cylinder:

Surface Area=603.2

height=10 A string is stretched corner to corer on a floor tiled with square tiles. If the floor is 28 tiles long and 35 tiles wide, over how many tiles does the string cover?