Can someone help me with this Circled question for the dot plot :)

Write a division equation you could use to find a, the number of miles ava is in charge of. what is the value of a? write your answer is simplist form

#1-20 state whether the angles are alternate interior, alternate exterior, vertical, or corresponding angles.

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)