Answer:
15 days
Step-by-step explanation:
5 people * 16 days * 6 hrs= 480 hours
8 people * x days * 4 hours= 32x hours
- 32x=480
- x= 480/32
- x= 15 days
Answer:
-40% change
Step-by-step explanation:
- This change is a decrease, so first you need to find the difference between the two numbers--> 125 - 75 = 50
- Next, you divide by the original number, so 50 ÷ 125 = 0.4
- Finally, you multiply your answer by 100, so 0.4 x 100 = 40%. Because this is a decreasing change, you add a negative sign.
Answer: 160 miles
Step-by-step explanation:
Given that :
Miles ran = r ; at the speed of 5 miles per hour
Miles biked = b ; at the speed of 10 miles per hour
Total miles biked and ran = 200 miles
If she biked for twice as many hours as she ran
Let hours
Total number of miles Morgan biked
r + b = 200 - - - (1)
From speed = distance / time
Hours biked = distance / speed = b / 10
Hours ran = distance /speed = r / 5
b/ 10 = 2 (r/5)
b / 10 = 2r / 5
Cross multiply
5b = 20r
b = 4r
Substitute into (1)
r + b = 200
r + 4r = 200
5r = 200
r = 200/5
r = 40 miles
Total number of Miles biked ;
r + b = 200
40 + b = 200
b = 200 - 40
b = 160 miles
The group of five people can be selected in 33649 ways
Step-by-Step Explanation:
When the selection is being made without order then the combinations are used. Permutation is another methods used for selection if the selection has to be distinct. while here, we only have to select a group of 5 people out of 23, we will use combination
Combination is solved by:
Here
n = 23
r = 5
Putting the values
The group of five people can be selected in 33649 ways
Keywords: Combination, Permutation
Learn more about selection at:
#LearnwithBrainly