Answer:
18
Step-by-step explanation:
multiply 7 and 3
reduce 15/5 to 3
subtract 21-3
18
Answer:
the answer is b
Step-by-step explanation:
Answer:
He will take 60 seconds to move from one end of the sidewalk to other.
Step-by-step explanation:
Given:
A person on a moving sidewalk,
21 feet in 7 seconds
Then 180 feet
To Find:
Total time =?
Solution:
Speed:
Speed is defined as the rate of distance covered in per unit time.
It is given as
![\textrm{Speed }=\dfrac{\textrm{Distance}}{Time}](https://tex.z-dn.net/?f=%5Ctextrm%7BSpeed%20%7D%3D%5Cdfrac%7B%5Ctextrm%7BDistance%7D%7D%7BTime%7D)
Substituting the given values we get
![\textrm{Speed }=\dfrac{21}{7}=3\ m/s](https://tex.z-dn.net/?f=%5Ctextrm%7BSpeed%20%7D%3D%5Cdfrac%7B21%7D%7B7%7D%3D3%5C%20m%2Fs)
Now, With this speed if he walk 180 feet then the time is
![\textrm{Time}=\dfrac{\textrm{Distance}}{Speed}](https://tex.z-dn.net/?f=%5Ctextrm%7BTime%7D%3D%5Cdfrac%7B%5Ctextrm%7BDistance%7D%7D%7BSpeed%7D)
Substituting Speed and Distance we get
![\textrm{Time}=\dfrac{180}{3}=60\\\\Time=60\ s](https://tex.z-dn.net/?f=%5Ctextrm%7BTime%7D%3D%5Cdfrac%7B180%7D%7B3%7D%3D60%5C%5C%5C%5CTime%3D60%5C%20s)
He will take 60 seconds to move from one end of the sidewalk to other.
Answer:
Put the segment mark above each set.
fe is congruent to Rs (do the opposite rs is congruent to fe)
Rs congruent to fe (opposite)
fd is congruent to rt (opposite) I think
X = -5.4
Hope that helped