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
Substituting the given values we get
Now, With this speed if he walk 180 feet then the time is
Substituting Speed and Distance we get
He will take 60 seconds to move from one end of the sidewalk to other.
The only way to write 42 as the product of primes (except to change the order of the factors) is 2 × 3 × 7. We call 2 × 3 × 7 the prime factorization of 42.
Find the gradient/slope
6-6/5-(-2) deltaY/deltaX
=0 shows its a straight line
Delta X = 7
Distance between P & M = 7 units
If M is the midpoint then Q is 7*2 units
Away from P (14 units away)
-2 + 14 units = 12 x-coordinate
Hence the coordinates of Q
= (12,6)
FINAL ANSWER:
Coordinates of Q (12,6)