What’s an algebraic expression for 25 less than a number

What is the pattern in the values as the exponents increase?

Complete each statement from the information given and the triangle criterion you used. if the triangles cannot be shown to be congruent, leave the box for the second triangle blank and choose for reason “cannot be determined.” carbon - regular hexagon. ∆can ≅ ∆ by

What is the simplified form of square root of 400 to the 100th power ?