exam Maths Puzzle Numerical Ability

The length of a rectangular playing field is 5ft less than twice its width.If the perimeter of the playing field is 230ft,find the length and width of the field.

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exam Other Question

determine if the equation represents ay as a function of x.
x^2+y^2=4
please help me thanks
Write the equation of the line passing through each of the given pairs of points. Write your
result in slope-intercept form, where possible.
a.) (-1, 3) and (4, -2)
b.) (2, -3) and (2, 4)