exam Maths Puzzle Numerical Ability

Hello, please help me. I need to find the area of a rectangle. One side is /3+/5 (my / means rational) and the other side is the same.

Thanks.

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exam Other Question

One person can devote 24 hours a week to a project and two others can each devote 30 hours a week to the same project. If the total project requires 420 hours to complete, how many weeks will it take? State the coordinates of the vertex of the parabola whose equation is
y = 3(x - 2)2 + 5

(-2, -5)
(-2, 5)
(2, -5)
(2, 5)
none of these