Solve the Following System of equations. PLEASE HELP AND SHOW WORK, IM ABOUT FAILING MATH AND I REALLY NEED TO COPY THE ANSWER AND THE WORK :(

Can someone me with this problem i don't understand i need

Which expression gives you the distance between the points (5,1)and(9,-6)

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