exam Maths Puzzle Numerical Ability

please help me to

simplify

-6 * square root of 2(5*square root of 2 - 5 times the square root of 10)

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exam Other Question

Solve the inequality: 2y^2 + 13y > 15 find the rate of change and make a graph for: -$7.50 weekly for 12 weeks with a balance of $432.50 I thought it was using formula Y=mx+b but I am not sure.

Thanks,
Frank