book Maths Puzzle Numerical Ability

What is the equivaleant to: 3a+4b-(-6a-3b)

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book Other Question

can some one please help me with this problem??

Solve the quadratic equation.

5t^2=240
4 points ( 2 for determining points and 2 for the graph)
Graph the following inequality and shade it.
4X + Y > 4 ( , ) ( , ) Please answer the question in words describing and not graphed.