What is the solution of sqrt(2x+4)-sqrt(x)=2 a. x = 0 b. x = 0 and x = 16 c. x = 0 and x = –16 d. x = 16 and x = –16

What is the difference between regular convex and concave polygons

Ineed to know the answer to this algebra question.

Afamily has five members. a mom, a dad, two sisters, & a brother. the family lines up single file. what is the probabillity that the mom is at the front of the line