exam Maths Puzzle Numerical Ability

Please help me solve this equation {{{ (5^2√3)(25^-√3) }}}.

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exam Other Question

the problem is on pg 414 of chp 14 review questions
root (3x-2)-root(x+7)=1
Please help solve.

Find an equation of each line, and write it in slope-intercept form.

Trough (-7,2) and parallel to 3x +5y=6