4 meters, since 100 centimeters equal 1 meter you'd divide 400 by 4 to get your answer of 4 meters. It's just basic math. Don't get so scared that you'll get your answer wrong and just focus.
If you divide the first equation by 2 and the second by 3, you get

These equations differ only in their y-intercept, so describe parallel lines. The appropriate choice is ...
... H The lines are parallel.
Answer:
See Explanation
Step-by-step explanation:
A positive integer is a perfect square if it can be expressed as the product of two same positive integers.
Any number that cannot be written this way is a non-perfect square.
Since the integers are not presented, we will quickly examine the perfect squares between 1 and 50.
The perfect squares are: 1,4,9,16,25,36 and 49.
- 1=1 X 1
- 4=2 X 2
- 9=3 X 3
- 16 =4 X 4
- 25 =5 X 5
- 36 =6 X 6
- 49 =7 X 7
Every other positive integer in the numbers 1-50 apart from those listed above is a non-perfect square.
The general equation for this is d = s*t. d = distance flown, s = speed that the airplane travels, and t = time. So for this particular probelm you would use
d = 20*s