PLS HELP PLS HELP PLS HELP PLS

Solve for x i'll try to attach the files bc it's not letting me for some reason

The reflexive property of congruence lets you say that ∠pqr ≅

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)