exam Maths Puzzle Numerical Ability

Simplify:

5x^3(7x)^2

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exam Other Question

3x-5(3x-7)=2(x+9)+45 I would like to get some help on these problems. Thank you for taking the time to help me out.

Find the slope of the line passing through the points (3,4) and (3,-4)

Graph 3