Answer:
-1
Step-by-step explanation:
-6n-3n= -9n
divide by -9 on both sides
then you'll get your answer
The greatest common factor of 36 and 81 is 9
I hope this helps you
48=2 (4+w)
24=4+w
w=20
Answer:
Hey there!
See Below.
Step by step explanation:
Total time taken= 11-5=6 hours
Time of stoppage= 1 hour
Actual time taken= 6 hours - 1 hour = 5 hours
![Speed= \frac{distance}{time}](https://tex.z-dn.net/?f=Speed%3D%20%5Cfrac%7Bdistance%7D%7Btime%7D%20)
![= \frac{252}{5} \: km/h](https://tex.z-dn.net/?f=%20%3D%20%20%5Cfrac%7B252%7D%7B5%7D%20%20%5C%3A%20km%2Fh)
![= 50.4 \: km/h](https://tex.z-dn.net/?f=%20%3D%2050.4%20%5C%3A%20%20km%2Fh)
![Average \: Speed= \frac{total \: distance}{total \: time}](https://tex.z-dn.net/?f=Average%20%5C%3A%20%20Speed%3D%20%5Cfrac%7Btotal%20%5C%3A%20distance%7D%7Btotal%20%5C%3A%20time%7D%20)
![= \frac{252}{6} \: km/h](https://tex.z-dn.net/?f=%20%3D%20%20%5Cfrac%7B252%7D%7B6%7D%20%20%5C%3A%20%20km%2Fh)
![= 42 \: km/h](https://tex.z-dn.net/?f=%20%3D%2042%20%5C%3A%20km%2Fh)
- Hence,the speed is 50.4 km/h and the average speed is 42 km/h.
Answer:
$21.85
Step-by-step explanation
the equation would be
4.95b+3.50c
b= the number of books (3)
c= the number of candles (2)
plug in the numbers
4.95(3)+3.50(2)=21.85