Answer: The 3rd equation is a true proportion
Brainliest please! <3
1) a = tickets in advance goal = 2000
d =tickets at door
6a +8d = 2000
6(142)+8d =2000
852+8d=2000
8d=2000-852
8d=1148
d=1148/8
d=143.5
round up d=144 need to sell 144 tickets at door
I think the 2nd picture is the answer to your question
(x + 5)(x - 7) = x^2 - 7x + 5x - 35 = x^2 - 2x - 35