exam Maths Puzzle Numerical Ability

How do I use the quadratic formula to solve: 1.4x^2-2x-10=0

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exam Other Question

Please help me solve the following,

Solve Graphically: not sure what that means?

1)y > 2x -1

2) y < x + 4 and y > 2 - x

Graph the following function. Is it continuous a path 2.5 m wide runs along inside the boundary of a square field whose side is 65 m. the path is to be covered with red gravel and the rest of the field is to be manured find the