exam
Maths Puzzle
Numerical Ability
help please
1.3x + 4y + 3 = 0
2.x = 2y + 4
3.y - 4 = 5y + 3x - 2
4.x + 1/4x + 1/4 = y + 1/4y + 1/4
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A circular pond 26 yd in diameter is surrounded by a gravel path 2 yd wide. The path is to be replaced by a brick walk costing $50 per square yard. How much will the walk cost?
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A quadratic function is given.
(a) express the quadratic functino in standard form
(b) find it