Answer:
Step-by-step explanation:
Mark as brainliest
10+10=20, 15+5=20 Those are both addition sentences that have a sum of 20.
range{-2,00)
Step-by-step explanation:
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.