Read the proof. given: ab ∥ de prove: △abc ~ △edc statement reason 1. ab ∥ de 1. given 2. ∠acb and ∠ecd are vert. ∠s 2. definition of vertical angles 3. ∠acb ≅ ∠dce 3. vertical angles are congruent 4. ∠bde and ∠dba are alt. int. ∠s 4. definition of alternate interior angles 5. ∠bde ≅ ∠dba 5. alternate interior angles are congruent 6. △abc ~ △edc 6. ?

Answer each of the questions for the following diagram: 1. what type of angles are these? 2. solve for x. what does x equal? 3. what is the measure of the angles?

Given are five observations for two variables, x and y. xi 1 2 3 4 5 yi 3 7 5 11 14 which of the following is a scatter diagrams accurately represents the data? what does the scatter diagram developed in part (a) indicate about the relationship between the two variables? try to approximate the relationship betwen x and y by drawing a straight line through the data. which of the following is a scatter diagrams accurately represents the data? develop the estimated regression equation by computing the values of b 0 and b 1 using equations (14.6) and (14.7) (to 1 decimal). = + x use the estimated regression equation to predict the value of y when x = 4 (to 1 decimal). =

How many and of which kind of roots does the equation f(x)=x3−x2−x+1