exam Maths Puzzle Numerical Ability

What are the roots of (4x-3)^2=36?

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exam Other Question

If $4000 is invested at 6%, how much must be invested at 3% so that the total annual income will be $270? Determine which two equations represent parallel lines.
Hint: Remember which part of the equation will be the same in equations representing parallel lines.
(a) y = 8x - 6 (b) y = -8x + 6 (c) y = 8x + 5 (d) y = x - 6