exam Maths Puzzle Numerical Ability

if the area of a square is 21 more the the perimeter, what is the length of a side

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exam Other Question

wihtout graphing, decide whether the points would lie on the graph of the equation.

2x+4y=20

a. (6,2)
b. (2,4)
c. (10,4) f (x) = x2to the second power 7x + 10; find (a) f (0), (b) f (5), and (c) f (-2).: f (x) = x2to the second power 7x + 10; find (a) f (0), (b) f (5), and (c) f (-2).