Solve pls brainliest

Could someone with number 1 and 2

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)

Use composition to determine if (x) or h(x) is the inverse of f(x) for the limited domain x2-1.