Convert the following mixed number into an improper fraction: 3 2/8

What number should be added to the expression x^2+3x+ in order to create a perfect square trinomial? 3/2 3 9/4 9

Aladder that is 20ft long is leaning against the side of a building. if the angle formed between the ladder and the ground is 75 degrees how far is the bottom of the from the base of the building?

What is the missing reason in the proof? segment addition congruent segments theorem transitive property of equality subtraction property of equality?