1. Determine the number of combinations of the letters of the word EXAMINATION given that four letters are taken at a time.
(5marks)

Ihonestly have no clue if it's each or none.

5, 6, 10 question: a. determine whether the side lengths form a triangle. (explain your reasoning) b. if it is a triangle, determine whether it is a right, acute, or obtuse triangle. (show your work)

The given diagram shows the parts of a right triangle with an altitude to the hypotenuse. using the two given  measures, find the other four.