exam Maths Puzzle Numerical Ability

During basketball season, emily scored 3 more than twice the number of points kayla scored. emily scored 251 points. write an equation that can be used to find the number of points, k. that kayla scored.

(3x)2=251

(3x) squared=251

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exam Other Question

square root of x+1 + square root of x-1 = square root of 2x+1
Please help....if you can break it down to the simplest my book does not explain how to work with one that involves three radicals. Thank you so much Solve the word problem

If one-half of one integer is subtracted from three-fifths of the
next consecutive integer, the difference is 3. What are the two integers?

Thank You!!!