<span>If we add these two equations together, we can quickly follow the system via the elimination method as the y-terms cancel out.
Doing so results in 6x= -30, so x = -5. Plug this in and solve for y.
2*(-5) + 3y = -7, -10 + 3y = -7, 3y = 3, y = 1.
The solution is therefore (-5,1).</span>
Answer:
, or 12.47
Step-by-step explanation:
I looked this up on my scientific calculator. I hope this helps! :)
Answer:
10, 26, 74, 218, 650
Step-by-step explanation:
n * 3 - 4
The expressions 100×10 and the more complicated
(100 - 4a)(10 + a)
are calculating annual (expected) revenue. In 100×10 the 100 is the number of decks and the 10 is the price per deck. In (100 - 4a)(10 + a) the 100-4a is the number of decks and the 10+a is the price per deck. So a must be the amount the price increases.
Answer: amount of price increase, last choice