Answer:
there is an app I use that is called desmos graphing calculator and it is very helpful with problems like this.
The set of lengths that could not form a triangle is 15,7,6
Answer:
21
Step-by-step explanation:
Chickens - 2x
cows - 4x
goats = 4x
2x+4x+4x+210
10x=210
x=21
CHECK:
21 chickens = 42 legs
21 cows = 84 legs
21 goats = 84 legs
42+84+84=210 legs
25,000 + 600 considering they would meet at 0, so they are 25,600 feet apart