Students ages 10-17 were survey about their eating habits during breakfast

Two parallel lines are crossed by a transversal. what is the value of x? x = 40 x = 70 x = 110 x = 130

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

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