exam Maths Puzzle Numerical Ability

Solve for x

25x^2=13

Having trouble with this one. Thanks in advance.

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exam Other Question

W x (L=9) = 36 2

length is 9 inches greater than the width area 36in2.
Can you please break down how this is done (the formula).
Thank you The basal energy requirement B is the number of calories that a person needs to maintain the life process. For a 28-year old female with a height of 160 centimeters and a weight of