Which of the following expressions has a value of 1?

Asailor is looking at a kite. if he is looking at the kite at an angle of elevation of 36and the distance from the boat to the point where the kite is directly overhead is 40 feet, how high is the kite?

What is the ordered pair of m’ after point m (5, 6) is rotated 90° counterclockwise?

Idon't get undoing if its pass adding and subtracting so can someone ? x-2 over 5 = 18