Answer:
A. 400
Step-by-step explanation:
initially have 50 pounds after 6 hours, doubles to 100. 6 (12 total) more hours 100 doubles to 200. after another 6 (18 hours) 200 doubles to 400.
The answer is D. 5^-2 times 5^4.
Measuring tool or observer of force being applied to the ball

Then rearrange the equation to get 10x on the same side as 25.
Keep in mind, once bringing to the other side, your constant and variable will switch to a negative or positive for example,
-10x will become +10x. Another example is +20x will become -20x once brought to the other side.
Continuing on once rearranged, your equation will look like,

Then we have to get rid of the 2 on 2y so you will have to divide both sides by 2.

Dividing both sides by 2, you will get,

The reason why we don't divide and rather keep the 25/2 (25 divded by 2) is because 25 divided by 2 will give an answer with a decimal and that we don't want a decimal in our equation so we just keep it the way it is. If you ever get a decimal, make sure you keep it in its fraction form.
Answer: 54x^2 - 330x - 336
step by step explanation:
6 (x-7) x (9x+8)
distribute 6 through the parentheses
(6x - 42) x (9x+8)
multiply the parentheses
54x^2 + 48x - 378x -336
collect like terms
54x^2 - 330x - 336
and thats your answer
hope this helps you :)