Answer:
Step-by-step explanation:
um
Let x be the number on the first bus.
The distribution of students is x + (x +4) + (x + 4 + 9) = 167
3x + 17 = 167
3x = 167 - 17 = 150
The number on the first bus x = 50
The number on the second bus = 54
The number on the third bus = 63
B because it’s a random sample and it’s not biased
Answer:
36654.52
Step-by-step explanation:
The ratio is 14-22
now before we do anything with the ratio, there are 24 hours in a day.
he sleeps for 8 hours so, 24-8= 16. 16 hours he's up.
Every hour is 60 minutes, every minute is 60 seconds. 60x60=3600.
so, 3600 seconds per hour.
3600x16= 57600 seconds per 16 hours.
Now back to the ratio, 14-22. 57600/22= 2618.18
2618.18x14= 36654.52.
He blinks 36654 in the day (if decimals don't count)
I hope this helps and isn't confusing/incorrect.
Answer:
C.
Step-by-step explanation:
So there are 20 kids with brown hair and this represents 80% of the class total.
So this means 20=.8n since we don't know the total number of kids.
20=.8n
Divide both sides by .8
25=n
So 25 is the total number of kids.
C. is the answer
You could also setup this equation given that 80% is 80/100:
[tex]\frac{20}{\text{ total }}=\frac{80}{100}
To figure out what that total is there you can divide top and bottom of the fraction on right hand side by 4 which gives you the 20 on top and the 25 on bottom.