The distance covered by a free-falling object in 'T' seconds after it's dropped is
D = (1/2) x (gravity acceleration) x (T²)
Gravity acceleration on Earth is 9.8 m/s². or 32.2 feet/sec² .
20-ft = (1/2) (16.1) (T²)
20 = 8.05 T²
T = √(20/8.05) = <u>1.576 seconds .</u>
Answer:
No
Step-by-step explanation:
Solutions to systems of equations are points at which the lines of the equations intersect. Knowing this, only equations representing the same line would have infinitely many solutions because they would intersect at every one of each other's points - they're the exact same line. Therefore, if they are not the same line, they would not intersect at each and every point, and would not have infinitely many solutions.
Answer:
hi
Step-by-step explanation:
want to start a conversation
Answer:
9
Step-by-step explanation:
All you have to do is follow this order while working a problem!
Example 1:
If a = 4 and b = 5, what is ab – 2b?
Since there are no parentheses or exponents,
you first plus in the values for a and b and multiply those together.
(4 ´ 5) You get 20.
Then, you multiply 2b or (2 ´ 5 )which gives you 10.
Last, you subtract the second answer from the first (20 -10),
which gives you 10!
Example 2:
Evaluate 6x / 4 when x = 6.
Because multiplication and division are equal in the order of operations, you solve the problem by reading it from left to right like one would read a book.
6 x 6 = 36.
You then divide that number by 4.
The correct answer is 9.
(clip art was taken from http://www.kidsdomain.com/holiday/school/clip.html)
These are ways the equation for speed are commonly expressed:
speed = distance/time
v = s/t or v = (ds/dt)