To see if curriculum changes are effective, researchers took a sample of 100 eighth graders' standardized test scores from this year and compared them to a sample of 100 scores of last year's eighth graders (on the same exam).

decide whether the study was a paired design using repeated measures, a paired design using matching, or an independent groups design.

question 1 options:

paired design using repeated measures

independent groups design

paired design using matching

each student in an intro stat class walked 100 yards twice. once with arms down at his/her sides, another time while "pumping" arms up and down with each stride. the order of "pumping" or "not" was randomized for each student. heart rate (beats per minute) was measured after each walk.

decide whether the study was a paired design using repeated measures, a paired design using matching, or an independent groups design.

question 2 options:

paired design using repeated measures

independent groups design

paired design using matching

Atrain traveled for 1.5 hours to the first station, stopped for 30 minutes, then traveled for 4 hours to the final station where it stopped for 1 hour. the total distance traveled is a function of time. which graph most accurately represents this scenario? a graph is shown with the x-axis labeled time (in hours) and the y-axis labeled total distance (in miles). the line begins at the origin and moves upward for 1.5 hours. the line then continues upward at a slow rate until 2 hours. from 2 to 6 hours, the line continues quickly upward. from 6 to 7 hours, it moves downward until it touches the x-axis a graph is shown with the axis labeled time (in hours) and the y axis labeled total distance (in miles). a line is shown beginning at the origin. the line moves upward until 1.5 hours, then is a horizontal line until 2 hours. the line moves quickly upward again until 6 hours, and then is horizontal until 7 hours a graph is shown with the axis labeled time (in hours) and the y-axis labeled total distance (in miles). the line begins at the y-axis where y equals 125. it is horizontal until 1.5 hours, then moves downward until 2 hours where it touches the x-axis. the line moves upward until 6 hours and then moves downward until 7 hours where it touches the x-axis a graph is shown with the axis labeled time (in hours) and the y-axis labeled total distance (in miles). the line begins at y equals 125 and is horizontal for 1.5 hours. the line moves downward until 2 hours, then back up until 5.5 hours. the line is horizontal from 5.5 to 7 hours

I'm confused on how to solve the triangle. can someone me ?

Where would an imaginary line need to be drawn to reflect across an axis of symmetry so that a regular pentagon can carry onto itself