Answer:
<u>It would be the fourth option</u>
Step-by-step explanation:
If you try this for each pair, it is true
2/2 = 1 1 + 4 = 5
3/2 = 1.5 1.5 +4 = 5.5
4/2 = 2 2 + 4 = 6
6/2 = 3 3 + 4 = 7
Answer:The faster person will do the job in 7.53hours
Step-by-step explanation:
Let t=faster person
Let t-1= the other person
The job to be done =1
Each person will do a fraction of the job
4/t+4/t-1=1
Multiply both sides wit t(t-1)
4(t+1)+4t=t(t-1)
4t+4+4t=t^2+t
8t+4=t^2+t
0=t^2+t-8t-4
t^2-7t-4=0
Use Almighty formular to solve d quadratic equation
X=-b+- rootb^2-4ac/2a
X=t,a=1,b=-7 c=4
Substituting the values you get:
t=-7 +- root 49+16/2
t=-7 +- root 65/2
t=7 +8.06/2=15.06/2
t=7.53 hours
Answer:
0.48 feets
Step-by-step explanation:
Given that :
Length of stone = x
Number of stones used = 25
Length of path made from the stones = 12 feets
Hence. The length of each stone could be obtained by dividing the length of path by the number of stones used :
length of path / number of stones
= 12 feets / 25
= 0.48 feets
Hence length of each stone = 0.48 feets