exam Maths Puzzle Numerical Ability

Plot the graph of the equations 2x - 3y = 6 and 2x + y = -10 and interpret the result.

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exam Other Question

What is the transformational form of the quadratic function described by the mapping rule (x,y)> (x+2,3/4y-3)?
I said 4/3y+3=(x-2)^2 but I was marked wrong:( Rose's garden is in the shape of a trapezoid. If the height of the trapezoid is 16m, one base is 20m and one is 224m^. Find the length of the other base.

PLEASE EXPLAIN!