Help&EXPLAIN

Don’t use for points or will be reported and I’ll take the points back

Write an explicit formula that represents the sequence defined by the following recursive formula:

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

What is the length of the segment, endpoints of which are intersections of parabolas y=x2? 11 4 x? 7 4 and y=? 7 8 x2+x+ 31 8 ?