Answer:
20 seconds
Step-by-step explanation:
speed = distance/time
distance = speed * time
The faster racer will catch up to the slower racer in x meters ahead of the slower racer.
The faster racer is 40 meters behind the slower racer, so he travels x + 40 until he catches up.
Slower racer:
speed = 12 m/s
distance = x
time = t
Faster racer:
speed = 14 m/s
distance = x + 40
time = t (the same time as the slower racer)
Slower racer:
distance = speed * time
x = 12t
Faster racer:
x + 40 = 14t
System of equations:
x = 12t
x + 40 = 14t
Since the fist equation is already solved for x, substitute 12t for x in the second equation and solve for t.
12t + 40 = 14t
40 = 2t
20 = t
t = 20
The faster racer catches up in 20 seconds.
Answer:
10
Step-by-step explanation:
Answer:
Primates
Step-by-step explanation:
It is the most specific because homo, hominidae and O sapiens fall under the catogory of primates
Answer:
20x-8y+ 7/20
Step-by-step explanation:
Hi! I think I understand the question.
The error in the plot is the median and the lower quartile.
From smallest to largest, these are the numbers with the median, lower quartile, and upper quartile are pointed out:
3,3,4| 4.5 |4,5,5| 5.5 |6,7,7| 7.5 |8,8,9
As you can see above, the correct median and lower quartile are 5.5 and 4.5. In your plot, the median and lower quartile are 6 and 4.
I hope this helped and I hope you're feeling better. :)
