What shape is at the top of the quadrilateral hierarchy? 1. rectangles
2. parallelograms
3. squares
4. quadrilaterals

The graph shows the distance y, in inches, a pendulum moves to the right (positive displacement) and to the left (negative displacement), for a given number of seconds x. how many seconds are required for the pendulum to move from its resting position and return? enter your answer in the box.

How do you create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1?

Jack did 3/5 of all problems on his weekend homework before sunday. on sunday he solved 1/3 of what was left and the last 4 problems. how many problems were assigned for the weekend?