How wide is a rectangle strip of land with length 1 1/2 kilometers and area 3/4 square kilometers

The parabola x = y² - 9 opens: a.)up b.)down c.) right d.)left

We just started the introduction into circles and i have no idea how to do this.

Luke started a weight-loss program. the first week, he lost x pounds. the second week, he lost pounds less than times the pounds he lost the first week. the third week, he lost 1 pound more than of the pounds he lost the first week. liam started a weight-loss program when luke did. the first week, he lost 1 pound less than times the pounds luke lost the first week. the second week, he lost 4 pounds less than times the pounds luke lost the first week. the third week, he lost pound more than times the pounds luke lost the first week.