How do i simplify ((x^2)/(4y^-2))^(-1/2)?

What number should be added to both sides of the equation to complete this square? x^2-10x=7

How do you find principle and simple interest

Prove the divisibility of the following numbers: 25^9 + 5^7 is divisible by 30.also, read as (25 to the power of 9) + (5 to the power of 7) is divisible by 30. blank x 30what is the blank? ( it should be expressed in exponent form)