Which coordinate for points A and B would help prove that lines AB and A'B'are perpendicular?
O A: (p, m) and B: (2,1)
O A: (p, m) and B: (2, -w)
O A: (p, -m) and BP: (2,6)
O A: (p, -m) and B: (2, -w)
Al-m, p)

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup

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.

Can someone, me with this.i really need with this