D=1/2.g.t^2,
where D=distance the object has fallen, g=9.81m/sec^2(being the pull of gravity), t=time elapsed in seconds.
Although the terms might seem intimidating, this is a simple substitution problem.
X + Y = _______
Substitute the values of X and Y in terms of w
(7w^2 + 4w - 6) + (w^2 - 11w + 13) = ______
Now all you need to do is combine like terms (terms that have the same variables raised to the same power)
8w^2 - 7w + 7
Final Answer: 8w^2 - 7w + 7
Answer:
{(6, -6), (-9,2), (6, -1), (-8, -9)}
The answer to your question is 'The Changs paid the correct amount for their purchases'. I apologize for being late, but this answer may help others later.
