Answer:
18 is a composite number. 18 = 1 x 18, 2 x 9, or 3 x 6. Factors of 18: 1, 2, 3, 6, 9, 18.
Prime factorization: 18 = 2 x 3 x 3, which can also be written 18 = 2 x 3²
<em>hope the answer helped:)</em>
Answer:45 mi/h
Step-by-step explanation:
Recall: Speed = distance / time
Let the time taken for the morning journey be 
and the time taken for the afternoon journey be ,and the distance covered be d
that means for the first journey,
30 = 
d = 30
Also for the afternoon journey,
d = 60 
Equating the two , since the same distance is being covered , we have
30 = 60
that is
= 
= 2
Also ,
total distance covered = 30 + 60
Average speed = total distance / total time
= 30 + 60 / +
Recall that = 2 , substitute this into the formula for average speed , then we have
Average speed = 30(2) +60 / 3
Average speed = 120 / 3
Therefore :
Average speed = 40 mi/hr
Answer:
Step-by-step explanation:
End time = 3 : 31
Elapsed time = <u> 1 : 12 </u> {subtract}
2 : 19
It started at 2:19 PM
Answer: Cole and his sister Chloe will take 81 minutes to clean the whole house.
Step-by-step explanation:
Total rooms in the house = 9
Total persons to clean the house = 2 (Cole and his sister Chloe)
Time taken by 1 person to clean one=18 minutes
Time taken by 2 persons to clean one room together=18 divided by 2 = 9 minutes
Time taken by 2 persons to clean 9 rooms (which is the total number of rooms in the house)=9 multiply 9 = 81 minutes
therefore, they will take 81 minutes to clean the whole house.
There isn't a specific number so i'll just list all of them.
2 : 100 millions
3 : 10 millions
4 : millions
5 : 100 thousands
0 : 10 thousands
0 : thousands
4 : hundreds
5 : tens
0 : ones
