Answer:
The computer loses 50%, percent of its value each year.
Step-by-step explanation:
See the graph attached.
A computer is sold for a certain price and then its value changes exponentially over time.
It is clear from the graph that at t = 0, the price was $500, then at t = 1 year, the price was $250 and at t = 2 years, the price was $125 and at t= 3 years, the price was $62.5 and so on.
Therefore, the computer loses 50%, percent of its value each year. (Answer)
I don't know about the first one but for the second one:

Answer: No, 1/3 is equal to 2/6
Step-by-step explanation: If you multiply the bottom number, the denominator, and the top number, the numerator, by 2, you will get 2/6 which is equal to 1/3.
Dollars is the dependent quantity because the amount you pay depends on how many gallons you've pumped.
Ugh, these questions.
21x^3y^4 + 15x^2y^2 - 12xy^3
3xy^2 (7x^2y^2 + 5x - 4y)
Clearing up clutter...
3xy² (7x²y² + 5x - 4y)
That's your answer. Thanks for working my brain. ;)