Answer:
x=4
Step-by-step explanation:

Answer:
100m
Step-by-step explanation:
just subtract them from each other
500m
- 400m
-----------
100m
Andre can complete 1.5 facts in one second.
Step-by-step explanation:
Given,
Number of multiplication facts completed in 90 seconds = 135
Therefore;
90 seconds = 135 facts
Dividing both sides by 90 to fins the facts per second

Andre can complete 1.5 facts in one second.
Keywords: unit rate, division
Learn more about unit rates at:
#LearnwithBrainly
30?
30pi = 2pi r
30pi / 2pi = 15
15 = r
double the radius to get the diameter
15)2 =30