Which number can be added to the data so that the range of the data will be 50?

Hi my sisters and brothers can tell me the answer because i don’t understand the question

Afamily of five rents a kayak and splits the total time, k, equally. each family member spent less than 25 minutes kayaking. which values can be used to complete the math sentence below so that it accurately represents the situation? intro done

How do you write a paragraph proof to prove that the corresponding angles shown are congruent