Select all equations that correctly really a decimal to a fraction or mix number

Which equations represents circles that have a diameter of 12 units and a center that lies on the y-axis? check all that apply

If (x-2) 2= 49, then x could be a. -9 b. -7 c.- 2 d. 5 e.9

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)