What is the horizontal line and vertical line.use x=blank and y=blank

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

Whit h equation best represents this situation the number 98 increased by an unknown number equal to 120

The dimension of the rectangular pool shown below are 40 yards by 20 yards