6 3/4 ÷ 4 1/2 = 27/4 ÷ 9/2 = 27/4 × 2/9 = 3/2 = 1.5
answer: 1.5 times
The first thing we must do for this case is find the amount of minutes we have then:
"45 minutes each day, 5 days each week, for 12 weeks":
(45) * (5) * (12) = 2700 minutes.
We consider the following conversion:
1 hour = 60 minutes.
Therefore the number of hours is:
(2700) * (1/60) = 45 hours
Finally the average rate in laps per hour is:
Average = (1800) / (45)
Average = 40 laps / hour
Answer:
his average rate in laps per hour is:
40 laps / hour
A^2-9a+20=a^2-5a-4a+20=(a^2-5a)+(-4a+20)
a^2-9a+20=a(a^2/a-5a/a)+(-4)(-4a/(-4)+20/(-4))
a^2-9a+20=a(a-5)-4(a-5)
a^2-9a+20=(a-5)[a(a-5)/(a-5)-4(a-5)/(a-5)]
a^2-9a+20=(a-5)(a-4)
or you can wirte like x ≈ 2.416
