In the diagram, what is the measure of angle 1 to the nearest degree?

33°
55°
75°
105

Which must be true in order for the relationship △zyv ~ △xwv to be correct? zy ∥ wx ∠z ≅ ∠y and ∠w ≅ ∠x zv ≅ vy and wv ≅ vx ∠z ≅ ∠x and ∠w ≅ ∠y

How can you find the mean absolute deviation (mad) for this set of data?

Factor the polynomial expression x6 – x3 – 20