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For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

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)

What’s the answer ? use the picture to see the problem