Match each expression with its value. (this is khan academy)

Which of the following of the following sets of side lengths could not form a triangle?

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)

The roots of the function f(x) = x2 – 2x – 3 are shown. what is the missing number?