Answer: Robert and Chris can skate 10 miles in 45 minutes.
Step-by-step explanation:
Let's start by finding the unit rate.
Robert and Chris can skate 
of a mile in 1 minute. Now we can multiply both by 45 to see how far the can go in 45 minutes.
45x1=45
The can skate 10 miles in 45 minutes.
Answer:
540 is the correct answer. Each mark is an increase of 20.
Answer:
Point S is your answer.
Step-by-step explanation:
See how all of them are rays, but they all connect at point S.
Point S is your answer.
72:80
9:10
Divide 72 and 80 by 8 to simplify it and get the ratio
