Please help Select the correct answer from each drop-down menu.
Gilbert is training for a bike race. As part of his training, he does practice rides on portions of the actual race course. Gilbert's first practice ride
covers 5 miles of the course, and his second practice ride covers 9 miles of the course. Between these practice rides, he increase his average speed by 2 miles/hour .

The denominator of the function that models practice ride 2 represent the
A . Increase in Gilbert’s average biking speed
B. Distance Gilbert’s travels
C . Time it takes Gilbert’s to travel 5 miles
D . Biking speed for the second practice ride .

To find a function that models the total amount of time Gilbert spend doing practice rides on the race course
A . Add
B. Multiply
C . Divide
D . Subtract
The functions